Summarize the following court judgment. Writ Petition (Criminal) No. 468 of 1989. (Under Article 32 of the Constitution of India.) R.K.Garg	 K. Subramaniam	 E.C. Agarwala	 Ms. Purnima Bhatt	 Mr. V.K. Pandita	 A.V. Pillai and Atul Sharma for the petitioner. K. Alagiriswamy	 Adv. General of Tamil Nadu	 N. Natara jan	 G. Krishnamurthy	 V. Krishnamurthy and K. Rajendra Choudhury for the Respondents. The Judgment of the Court was delivered by SINGH	 J. This petition under Article 32 of the Consti tution of India	 by Mrs. P. Devaki wife of the detenu R. Thamaraikani	 challenges the validity of her husband 's detention under the order of the Collector and District Magistrate of Kamarajar District Virudhunagar	 Tamii Nadu dated 15.8. 1989 issued under Section 3(1) of the Tamil Nadu Prevention of Dangerous Activities of Bootleggers	 Drugof fenders	 Forest offenders	 Immoral Traffic Offenders and Slum Grabbers Act	 1982 (Tamii Nadu Act 14 of 1982) (as amended by Act 52 of 1986 and Act 1 of 1988) (hereinafter referred to as 'the Act '). After heating arguments of the learned counsel for the parties at length	 we allowed the petition on 10.11. 1989 and issued directions for the release of the detenu forth with. We are now giving the reasons for our Order dated 10.11. The detenu R. Thamaraikani is a member of the All India Anna Dravida Munnetra Kazhagam Party	 briefly described as AIDMK. He has been an active social and political worker. He was elected Member of the Tamil Nadu Legislative Assembly from Srivilliputhur Constituency in the General Elections held in 1977	 1980 and 1984. In the General Elections held in January 1989 to the Tamil Nadu Legislative Assembly	 he was defeated by the Dravida Munnetra Kazhagam Party candi date. He continues to be Joint Secretary of the AIDMK Party for Kamrajar District in Tamil Nadu and he has been taking active part in social and political activities in the Dis trict of Kamrajar. The petitioner has stated that there has been personal and political animosity between the detenu and Thiru Durai Murugan	 Minister for Public Works and Highways in the present DMK Government. The District 839 Magistrate issued the impugned order for the detention of her husband at the behest of Thiru Durai Murugan	 the afore said Minister	 respondent No. 3. The petitioner has referred to a number of incidents and to the proceedings of the Tamil Nadu Legislative Assembly in support of her submission that there was political and personal animosity between the aforesaid Minister and her husband and the order of deten tion was made mala fide at the instance of the Minister	 respondent No. 3. The facts leading to the making of the impugned deten tion order are necessary to be noted. On 29.7.1989 a Seminar on Irrigation was ' held at Virudhunagar at the Dry Chilly Merchants ' Association Kalai Arangam	 Aruppukkotai Road	 which was attended by Thiru Durai Murugan and by Pon. Muthu ramulingam	 Minister of Labour and District Magistrate	 Kamarajan and other important personalities. A number of political and social workers and agriculturists attended the Seminar. According to the petitioner the detenu was invited to attend the Seminar although it is denied by the respond ents but there is no dispute that the detenu was present in the hall where the Seminar was held. The petitioner has asserted that the detenu wanted opportunity to address the gathering for placing the grievances of the local people before the gathering but he was not permitted to do so. He insisted for placing the grievances of his Party before the audience whereupon he was forcibly removed away by the Police and later a false criminal case was registered against him under Sections 147	 148	 307 read with Section 149 of the Indian Penal Code and Section 27 of the Indian Arms Act at the Virudhunagar East Police Station. These allegations have been denied by the respondents. According to the respondents the detenu was not invited	 even then he entered the hall where seminar was being held alongwith a number of persons and created disorderly scene in the hall which disturbed the Seminar. He threw a knife towards the Minister respondent No. 3	 with an intention to kill him but he missed the target	 later on	 he was over powered by the Police. The violent activities of the detenu and his men caused panick in the hall	 the audience raised alarm and ran outside the auditorium and outside the hail also people got scared	 they ran helter skelter	 causing obstruction to traffic. The proceedings of the Seminar came to an abrupt halt for a while. The detenu was taken into Custody and he was enlarged on bail by the Sessions Judge on 3.8.1989. Thereafter the District Magistrate and Collector Kamarajan	 respondent No. 2	 issued the impugned detention order after 17 days of the aforesaid incident under Section 3(1) of the Act	 as he was satisfied that it was necessary to detain the detenu under the Act with a view to prevent him from 840 acting in any manner prejudicial to the maintenance of public order. Pursuant to the aforesaid order of the Dis trict Magistrate the detenu was kept in detention. Mr. R.K. Garg learned counsel for the petitioner as sailed the validity of the detention order on two grounds. Firstly	 he urged that the order of detention was illegal since it did not specify the period of detention. Secondly	 the sole ground of detention has no relevance to the mainte nance of 'public order ' as the facts set out in the grounds do not make out any case of violation of public order	 at best	 it may be a case of law and order only. This petition was heard by a Division Bench consisting of two learned Judges of this Court. After hearing counsel for the parties at length the leaned Judges referred the matter to a three Judges ' Bench	 in view of the conflict of decisions of this Court in Commissioner of Police & Anr. vs Gurbux Anandram Biryani	 [1988] Supp. SCC 568 and Ashok Kumar vs Delhi Administration and Ors.	 on the question of validity of detention order on its failure to specify period of detention. That is how the petition was heard by this Bench. The first contention is rounded on the provisions of Section 3 of the Act which read as under: "3. Power to make orders detaining certain persons (1) The State Government may	 if satisfied with respect to any bootlegger or drng offender (or forest offender) or goonda or immoral traffic offender or slum grabber that with a view to prevent him from acting in any manner prejudicial to the maintenance of public order	 it is necessary so to do	 make an order directing that such person be detained. (2) If	 having regard to the circumstances prevailing	 or likely to prevail in any area within the local limits of the jurisdiction of a District Magistrate or a Commissioner of Police	 the State government are satisfied that it is neces sary so to do	 they may	 by order in writing	 direct that during such period as may be specified in the order	 such District Magistrate or Commissioner of Police may also	 if satisfied as provided in sub section (1)	 exercise the powers conferred by the said sub section: 841 Provided that the period specified in the order made by the State Government under this sub section shall not	 in the first instance	 exceed three months	 but the State Government may	 if satisfied as aforesaid that it is necessary so to do	 amend such order to extend such period from time to time by any period not exceeding three months at any one time. (3) When any order is made under this section by an officer mentioned in sub section (2)	 he shall forthwith report the fact to the State Government together with the grounds on which the order has been made and such other particulars as	 in his opinion	 have a bearing on the matter	 and no such order shall ramain in force for more than twelve days after the making thereof	 unless	 in the meantime	 it has been approved by the State Government." Placing reliance on Section 3(2) Mr. Garg urged that since the impugned detention order did not specify the period for which the detenu was required to be detained	 the order was rendered illegal. On an analysis of Section 3 of the Act as quoted above	 we find no merit in the submission. Section 3(1) confers power on the State Government to detain a bootlegger or drug offender	 or forest offender or goonda or an offender in immoral traffic or a slum grabber with a view to prevent him from acting in any manner prejudicial to the maintenance of public order. Section 3(2) empowers the State Government to delegate its power as conferred on it under sub section (1) to District Magistrate or a Commis sioner of Police	 if it is satisfied that the circumstances prevailing	 or likely to prevail in any area within the local limits of the jurisdiction of the District Magistrate or the Commissioner of Police	 make it necessary to delegate the power to them. It further provides that the order of delegation shall be in writing and it shall also specify the period during which the District Magistrate or the Commis sioner of Police	 are authorised to exercise the powers of the State Government under sub section (1) of Section 3. Proviso to sub section (2) lays down that the delegation should not be for an unlimited period	 instead it should not be for a period of more than three months. If the State Government is satisfied that it is necessary to extend the period of delegation it may amend its order	 extending such period from time to time but at no time the extension shall be for a period of more than three months. Once the State Government 's power under Section 3(1) is delegated to the District Magistrate or the 842 Commissioner of Police	 they are authorised to exercise that power on the grounds	 specified in Section 3(1) of the Act. Neither sub section (1) nor sub section (2) of Section 3 of the Act require the detaining authority to specify the period of detention for which a detenu is to be kept under detention. Section 3(3) requires that where detention is made by the delegate of the State Government	 namely	 the District Magistrate or the Commissioner of Police	 they should report the fact to the State Government together with the grounds on which the order may have been made and such other partic ulars as	 in their opinion	 may have a bearing on the mat ter. A detention order made by a District Magistrate or Commissioner of Police in exercise of their delegated au thority does not remain in force for more than twelve days after the making thereof	 unless in the meantime the deten tion order is approved by the State Government. Section 8 requires the detaining authority to communicate to the detenu	 grounds on which	 the order is made within five days from the date of detention to enable the detenu to make representation against the order to the State Government. Section 10 requires the State Government to place before the Advisory Board the detention order and the grounds on which such order may have been made alongwith the representation made by the detenu as well as the report of the officers made under Section 3(3) of the Act within three weeks from the date of detention. Under Section 11 the Advisory Board is required to consider the materials placed before it and after hearing the detenu	 to submit its report to the State Government within seven weeks from the date of detention of the person concerned. In a case where the Advisory Board forms opinion	 that there was no sufficient cause for the detention the State Government shall revoke the detention order but if in its opinion sufficient cause was made out	 the State Government may confirm the detention order and continue the detention of the person concerned for such period not exceeding the maximum period as specified in Section 13 of the Act. Section 13 provides the maximum period for which a person can be detained in pursuance of any detention order made and confirmed under the Act. Ac cording to this provision the maximum period of detention shall be twelve months from the date of detention. The State Government has	 however	 power to revoke detention order at any time	 it may think proper. Provisions of the aforesaid Sections are inbuilt safe guards against the delays that may be caused in considering the representation. If the time frame	 as prescribed in the aforesaid provisions is not 843 adhered	 the detention order is liable to be struck down and the detenu is entitled to freedom. Once the order of deten tion is confirmed by the State Government	 maximum period for which a detenu shall be detained can not exceed 12 months from the date of detention. The Act nowhere requires the detaining authority to specify the period for which the detenu is required to be detained. The expression "the State Government are satisfied that it is necessary so to do. they may. by order in writing direct that during such period as may be specified in the order" occurring in sub section (2) of Section 3 relates to the period for which the order of delegation issued by the State Government is to remain in force and it has no relevance to the period of detention. The Legislature has taken care to entrust the power of detention to the State Government	 as the detention without trial is a serious encroachment on the fundamental right of a citizen	 it has taken further care to avoid a blanket delegation of power	 to subordinate authorities for an indefinite period by providing that the delegation in the initial instance will not exceed for a period of three months and it shall be specified in the order of delegation. But if the State Government on consideration of the situa tion finds it necessary	 it may again delegate the power of detention to the aforesaid authorities from time to time but at no time the delegation shall be for a period of more than three months. The period as mentioned in Section 3(2) of the Act refers to the period of delegation and it has no rele vance at all to the period for which a person may be de tained. Since the Act does not require the detaining author ity to specify the period for which a detenu is required to be detained	 order of detention is not rendered invalid or illegal in the absence of such specification. Mr. R.K. Garg placed strong reliance on the decision of this Court in Gurbax Biryani 's case (supra) to support his submission. In that case the detenu had been detained under the Maharashtra Prevention of Dangerous Activities of Slum lords	 Bootleggers and Drug Offenders Act 55 of 1981. The High Court quashed the detention order on the ground that the detenu had been released in criminal prosecution under Section 8(c) read with Section 21 of the and he had been released on bail	 but that fact had not been placed before the de taining authority. On appeal by special leave a Division Bench of this Court consisting of two Judges.	 dismissed the appeal without going into the merits of the case on the sole ground that the detention order was bad as the period of detention was not specified in the detention order. The Court observed as under: 844 "The order is bad on another ground	 namely	 the period of detention has not been indicated by the detaining authority. The scheme of this Act differs from the provisions contained in similar Acts by not prescribing a perioed of detention but as Section 3 of the Act indicates	 there is an initial period of detention which can extend upto three months and that can be extended for periods of three months at a time. It was open to the detaining authority to detain the detenu even for a period of lesser duration than three months. That necessitated the period of detention to be specified and unless that was indicated in the order	 the order would also be vitiated. In scores of decisions this Court has been emphasising the necessity of strict compliance with the requirements of the preventive detention law; yet authori ties on whom the power is conferred have not been complying with the requirements and even if there be merit to support the order of detention	 the procedural defects lead to quashing thereof as a result of which the purpose of the Act if frustrated and the suffering in the community does not abate. " With great respect we do not agree with the view expressed by the learned Judges. Section 3 of the Maharashtra Prevention of Dangerous Activities of Slumlords	 Bootleggers and Drug offenders Act	 198 1 is identical in terms to Section 3 of the Tamil Nadu Act. Section 3 of Maharashtra Act does not require the State Government	 District Magistrate or a Commissioner of Police to specify period of detention in the order made by them for detaining any person with a view to preventing the detenu from acting in any manner prejudicial to the maintenance of public order. Section 3(1) which confers power on the State Government to make order directing detention of a person	 does not require the State Government to specify the period of detention. Similarly	 sub sections (2) or (3) of Section 3 do not require the District Magistrate or the Commissioner of Police to specify period of detention while exercising their powers under sub section (1) of Section 3. The obser vations made in Gurbux Biryani 's case that the scheme of the Maharashtra Act was different from the provisions contained in other similar Acts and that Section 3 of the Act contem plated initial period of detention for three months at a time are not correct. The scheme as contained in other Acts providing for the detention of a person without trial	 is similar. In this connection we have scrutinised	 the Pre 845 ventive Detention Act	 1950	 the Maintenance of Internal Security Act	 COFEPOSA Act	 National Security Act but in none of these Acts the detaining authority is required to specify the period of detention while making the order of detention against a person. This Court has consistently taken the view that an order of detention is not rendered illegal merely because it does not specify the period of detention. A Constitution Bench of this Court in Ujagar Singh vs The State of Punjab	 while considering validity of detention order made under Section 3 of the held that non specification of any definite period in a detention order made under Section 3 of the Act was not a material omission rendering the order invalid. In Suna Ullah Butt vs State of Jammu & Kashmir	 ; validity of detention order made under Jammu and Kashmir Preventive Detention Act 1964 was under challenge on the ground that the State Government while confirming the detention order under Section 12 of the Act had failed to specify the period of detention. The Court held that since the State Government had power to revoke or modify the detention order at any time before the completion of the maximum period prescribed under the Act	 it was not necessary for the State Government to specify the period of detention. In Suresh Bhojraj Chela ni vs State of Maharashtra	 while consider ing the validity of the detention order made under Section 3(1) of the this Court rejected simi lar submission made on behalf of the detenu that order of detention was vitiated as the Government had failed to mention the period of detention while confirming the order of detention. The Court held that the COFEPOSA Act did not require the detaining authority to mention the period of detention in the order of detention. When no period is mentioned in an order	 the implication is that the detention is for the maximum period prescribed under the Act. In A.K. Roy V. Union of India & Ors.	 ; a Constitution Bench of this Court considered the validity of the National Security Act (65 of 1980)	 Chandrachud	 CJ (as he then was) speaking for the Bench rejected the arguments made on behalf of the petitioner that the absence of provi sion requiring the detaining authority to provide for maxi mum period of detention was illegal. The learned C J	 ob served: "There is no substance in this grievance because	 any law of preventive detention has to provide for the maximum 846 period of detention	 just as any punitive law like the Penal Code has to provide for the maximum sentence which can be imposed for any offence. We should have thought that it would have been wrong to fix a minimum period of detention	 regardless of the nature and seriousness of the grounds of detention. The fact that a person can be detained for the maximum period of 12 months does not place upon the detain ing authority the obligation to direct that he shall be detained for the maximum period. The detaining authority can always exercise its discretion regarding the length of the period of detention. It must also be mentioned that	 under the proviso to Section 13	 the appropriate Government has the power to revoke or modify the order of detention at any earlier point of time. " On the basis of the above observations validity of a deten tion order passed under Section 3 of the National Security Act was challenged before this Court in Ashok Kumar vs Delhi Administration & Ors.	 on the ground that the Commissioner of Police	 as well as the Administrator of Delhi Administration who confirmed the detention order failed to specify the period of detention while making the order of detention. A three 'Judge 's Bench of this Court rejected the detention and upheld the validity of the deten tion order. A.P. Sen	 J. observed: "It is plain from a reading of Section 3 of the Act that there is no obvious fallacy underlying the submission that the detaining authority had the duty to specify the period of detention. It will be noticed that sub section (1) of Section 3 stops with the words "make an order directing that such person be detained"	 and does not go further and pre scribe that the detaining authority shall also specify the period of detention. Otherwise	 there should have been the following words added at the end of this sub section "and shall specify the period of such detention". What is true of subsection (1) of Section 3 is also true of sub section (2) thereof. It is not permissible for the courts	 by a process of judicial construction	 to alter or vary the terms of a Section. Under the scheme of the Act	 the period of deten tion must necessarily vary according to the exigencies of each case i.e. the nature of the prejudicial activity com plained of. It is not that the period of detention must in all circumstances extended to the maximum period of 12 847 months as laid down in Section 13 of the Act. " It is thus clear that the view taken in Gurbux Biryani 's case on the interpretation of Section 3 of the Maharashtra Act is incorrect. This Court has while considering the question of the validity of the detention order made under different Acts	 consistently taken the view that it is not necessary for the detaining authority or the State Govern ment to specify the period of detention in the order. In the absence of any period being specified in the order the detenu is required to be under detention for the maximum period prescribed under the Act	 but it is always open to the State Government to modify or revoke the order even before the completion of the maximum period of detention. We are	 therefore	 of the opinion that the impugned order of detention is not rendered illegal on account of the detain ing authority 's failure to specify period of detention in the order. Mr. R.K. Garg then urged that the sole ground on which the detention order is rounded does not relate to mainte nance of public order	 and it exhibits non application of mind by the detaining authority. While considering this submission it is necessary to reproduce the detention order as well as the grounds in support thereof. The detention order is as under: "DETENTION ORDER WHEREAS	 I	 Thiru T.S. Sridhar	 IAS	 Collector and District Magistrate	 Kamarajar District	 Virudhunagat	 am satisfied with respect to the person known as Thiru Thama raikani son of Ramaswamy Nader	 residing at Singammalpuram Street	 Srivilliputhur Town and Taluk that with a view to preventing him from acting in any manner prejudicial to the maintenance of public order	 it is necessary to make the following order. Now therefore in exercise of the powers con ferred by sub section (1) of Section 3 of the Tamil Nadu Prevention of Dangerous Activities of Bootleggers	 Drug Offenders	 Forest Offenders	 Goondas	 Immoral Traffic Of fenders and Slum Grabbers Act 1982 (Tamil Nadu Act 14/82) read with orders issued by the Government in G.O. Ms. No. 230	 Prohibition and Excise Department	 dated 23.3.1985 and subsequently amended in G.O. Ms. No. 815	 Home Prohibition and Excise Department dated 13.7.1989 848 under sub section (2) of Section 3 of the said Act	 I hereby direct that the said Thiru R. Thamaraikani son of Ramasamy Nader be detained and kept in Central Prison	 Madurai. S/d Collector and District Magistrate	 Kamarajan	 District Virudhunagar. " The ground of detention supplied to the detenu stated that the detenu was a habitual criminal	 a goonda and his activi ty had come to adverse notice in some cases reference to which was made by referring to some FIRs lodged against the detenu at the Police Station. But the incidents referred in those FIRs have not been made ground for detention instead facts stated in paragraphs 3	 4	 5 and 6 of the grounds constitute material on which the District Magistrate formed the requisite opinion under Section 3(1) of the Act in making the order of detention. These are as under: "(3) The ground on which the said detention order has been made as follows: On 29.7.1989	 the Kamarajar District Irrigation Seminar was held at "Dry Chilly Merchants ' Association Kalai Arangam" at Arupoukottai Road	 Viruthunagar Town. Hon 'ble Minister for P.W.D. Thiru Durai Murugan and Hon 'bIe Minister for Labour Thiru Pon. Muthumalaingam attended the Seminar which was presided over by the District Collector. At about 12.30 p.m. while the proceedings of the Seminar were on	 suddenly there was a commotion in front of the dias. Thiru Murali	 Sub Inspector of Police	 Vembakottai alongwith posse of men who were on bandobust duty there	 rushed up Thiru R. Thamaraikani inducing his henchmen saying "Finish Durai Murgan 's chapter today". The same time he (Thamaraikani) also threw a dagger aimed at Hon 'ble Minister Thiru Durai Murugan shouting "Finish Durai Murgans Chapter today". But the dagger missed the target and fell down on the stage. At once Thiru R. Thamaraikani took out a bottle containing petrol and a match box out of a hand bag which he carried in his hand. Instantly Thiru Murali	 Sub Inspector of Police	 Vembakottai and the P.C. 168 Murugesan 849 pounched and caught hold of Thiru R. Thamaraikani. The former seized the bottle and the match box. At the instiga tion of Thiru R. Thamaraikani	 his henchmen viz. Thiru Valargal Kenna	 son of Thangaraj Nader of Kammapatti	 Na reeswaran	 son of Smaraj Nadar of Kammapatti	 Kalipandian	 son of Krishna son thevar of Mall and Nagarajan	 on of Paramasive Thevar of Mangeseri who accompanied him also attempted to attack the Hon 'ble Minister for P.W.D.	 with knives in their hands. H.C. 829 Thiru Subbiahm P.C. 231 Thiru Subbiah and P.C. 469 Thiru Manraj duly assisted by some agriculturists surrounded and overpowered them and seized their knives. Seeing the violent activities of Thiru R. Thamaraikani and his men	 the gathering in the hall panicked. They raised an alarm and ran outside the auditori um and the crowd outside also got scared and ran helter skelter	 causing obstruction to traffic along Aruppukottai Road. The proceedings of the Seminar also came to an abrupt halt for a while. The Sub Inspector of Police arrested Thiru R. Thamaraikani and his four associates at about 1300 hrs. and brought them out with the help of the Deputy Superin tendent of Police	 Virudhunagar and other Police Officials who were then on duty there. On seeing this about 10 other henchmen of Thiru R. Thamaraikani who were waiting outside the auditorium escaped	 leaving behined an Ambassador Car IDR 667 and a van TCM 7797. On searching the car	 the Sub Inspector of Police found legal weapons viz. 1 sword	 4 koduvals and also 4 torch sticks	 the cloths of which were doused in kerosene. The said two vehicles along with the lethal weapons	 hand bag containing bottle with petrol. Rs. 1000 match box	 papers etc.	 were seized under an attachi at 1330 hrs. Then the Sub Inspector of Police	 handed over the accused persons and the properties seized under a special report at Virudhunagar East Police station. A case was registered in Cr. No. 180/89 u/ss 147	 148	 307 read with 149 I.P.C. and 27 Indian Arms Act at the Virudhunagar East Police Station. The Inspector of Police	 Law and order	 Virudhunagar Rural Circle took up the investigation. On Production before the Judicial Magistrate Court No. 1	 Thiru R. Thamaraikani was remanded to judicial custody in Central Prison	 Madurai on 30.7.89 and released on bail with condi tion to stay at Madurai on 3.8.89. The case properties were deposited in the Court. The case is still under investiga tion. 850 (4) The offence u/s 307 IPC is punishable under Chapter XVI of the IPC. By committing the above described grave offence in public	 in broad day light	 Thiru R. Thamaraikani has created a sense of alarm	 scare and a feeling of insecurity in the minds of the public of the area and thereby acted in a manner prejudicial to the maintenance of public order. His unlawful	 disorderly and dangerous activities on 29.7.89 are prejudicial to the maintenance of public order and have affected the even tempo of life of the community. (5) I am aware that Thiru R. Thamaraikani is now on bail with condition to stay at Madurai since 3.8.89. 1 am satis fied that his unlawful activities warrant his detention under the Tamil Nadu Act No. 14 of 1982. (6) I am satisfied that on the materials mentioned above	 if Thiru R. Thamaraikani is left to remain at large. he will indulge in ' further activities prejudicial to the mainte nance of public order and further recourse to normal law would not have the desired effect of effectively preventing him from indulging in activities prejudicial to the mainte nance of public order and therefore I consider that it is necessary to detain him in custody with a view to preventing him from acting in any manner prejudicial to the maintenance of public order." In substance the ground of detention states that while a Seminar was going on the detenu incited his men saying "Finish Durai Murgan 's Chapter today" and after saying that he threw a dagger aiming at Thiru Durai Murgan	 Minister but the dagger missed the target and fell down on the stage. Thereafter	 the detenu took out a bottle containing petrol and a matchbox out of a hand bag which he carried in his hand. Meanwhile	 the Sub Inspector of Police	 caught hold of the detenu. seized the bottle and the matchbox. It is fur ther stated that the detenu and those who accompanied him attempted to attack the Minister with knives in their hands but they were overpowered by the Police and the members of police. As a result of the incident those present in the hall panicked and got scared and ran helter skelter	 causing obstruction to traffic on Aruppukottai Road. The Seminar also came to an abrupt bald for a while. paragraph 4 of the detention order further states that the detenu by committing the aforesaid grave offence in public	 in broad day light created a sense of alarm	 scare and a feeling of insecurity in the minds of the public of the 851 area and thereby he acted in a manner prejudicial to the maintenance of the public order. His unlawful	 disorderly and dangerous activities on 27.7.89 were prejudicial to the maintenance of public order which affected the even tempo of life of the community. On the aforesaid facts	 the District Magistrate was satisfied that if the detenu was left to remain at 'large he would indulge in further activities prejudicial to maintenance of public order and recourse to normal law would not have the desired effect of preventing him from indulging in activities prejudicial to the mainte nance of public order. The question which falls for consideration is whether single incident of murderous assault by the detenu and his associates on the Minister at the Seminar held at Dry Chilly Merchants ' Association Kalai Arangam Hall was prejudical to the maintenance of public order. Any disorderly behaviour of a person in the public or commission of a criminal offence is bound to some extent affect the peace prevailing in the locality and it may also affect law and order problem but the same need not affect maintenance of public order. There is basic difference between law and order ' and 'public order '	 this aspect has been considered by this Court in a number of decisions	 see: Dr. Ram Manohar Lohia vs State of Bihar	 ; ; Pushkar Mukherjee & Ors. vs The State of West Bengal	 ; and Shymal Chakra borty vs Commissioner of Police Calcutta & Anr.	 ; In these cases it was emphasised that an act dis turbing public order is directed against individuals which does not disturb the society to the extent of causing a general disturbance of public peace and tranquillity. 1t is the degree of disturbance and its effect upon the life of the community in the locality which determines the nature and character of breach of public order. In Arun Ghosh vs State of West Bengal	 the Court held that the question whether a man has only committed a breach of |aw and order	 or has acted in a manner likely to cause disturbance of the public order	 is a question of degree and the extent of the reach of the act upon the society. This view was reiterated in Nagendra Nath Mondal vs State of West Bengal	 ; ; Sudhir Kumar Saha vs Commissioner of Police	 Calcutta	 ; ; S.K. Kedar vs State of West Bengal	 ; Kanu Biswas vs State of West Bengal	 ; ; Kishori Mohan vs State of West Bengal	 and Amiya Kumar Karmakar vs State of West Bengal	 In the instant case the detenu was placed under deten tion on the sole incident which took place on 29.7.89 and in respect of which the 852 detenu is facing criminal trial before a court of law. The alleged attempted murderous assault made by the detenu and his associates on Thiru Durai Murugan	 Minister for Public Works Department may have been made on account of political rivalry. In fact	 in his affidavit Thiru Durai Murugan has admitted that in the past the detenu had misbehaved with him even on the floor of the Legislative Assembly of Tamii Nadu while participating in discussion. The attempted assault took place in the hail of Dry Chily Merchants ' Association Kalai Arangam where two Ministers	 a number of officials including the District Magistrate	 as well as members of the public were present. It is alleged that the attempted mur derous assault on Thiru Durai Murugan created scare and a feeling of insecurity in the minds of the persons present in the hail and the detenu 's action interrupted the "proceed ings of the Seminar for a while" (emphasis supplied). This shows that the detenu 's activity disturbed the proceedings of the Seminar for a while but the Seminar appears to have continued later on. The incident did not and could not affect public peace and tranquillity nor it had potential to create a sense of alarm and insecurity in the locality. How could a single murderous assault on the Minister concerned at the Seminar could prejudicially affect the even tempo of the life of the community? No doubt in paragraph 4 of the grounds the detaining authority has stated that by commit ting this grave offence in public	 in broad day light	 the detenu created a sense of alarm	 scare and a feeling of insecurity in the minds of the public of the area and there by acted in a manner prejudicial to the maintenance of public order which affected even tempo of life of the commu nity. Repitition of these words in the ground are not suffi cient to inject the requisite degree of quality and potenti ality in the incident in question. A solitary assault on one individual can hardly be said to disturb public peace or place public order in jeopardy somuch as to bring the case within the purview of the Act. Such a solitary incident can only raise a law and order problem and no more. Moreover	 there is no material on record to show that the reach and potentiality of the aforesaid incident was so great as to disturb the normal life of the community in the locality or it disturbed general peace and tranquillity. In the absence of such material it is not possible to hold that the inci dent at the seminar was prejudicial to the maintenance of public order. In Manu Bhusan Roy Prodhan vs State of West Bengal & Ors.	 ; this Court held that a solitary assault on one individual	 which may well be equat ed with an ordinary murder which is not an uncommon occur rence	 can hardly be said to disturb public peace and its impact on the society as a whole cannot be considered to be so extensive	 widespread and forceful as to disturb the normal life of the community	 thereby 853 shaking the balanced tempo of the orderly life of the gener al public. The Court held that the detention order which had been made for preventing the petitioner from acting in a manner prejudicial to the maintenance of public order	 was not sustainable in law. On a careful consideration of the matter in all its aspects and having regard to the circum stances in which the alleged incident took place on 29.7.89	 we are of the opinion that the solitary incident as alleged in the ground of detention is not relevant for sustaining the order of detention for the purpose of preventing the petitioner from acting in a manner prejudicial to the main tenance of public order. The detaining authority	 namely	 the District Magistrate of Kamarajan District who was admittedly present at the Seminar	 has filed his own affidavit stating that he was sitting on the dias alongwith the Minister for Public Works Department Thus the incident which is the basis for deten tion of the detenu took place in the presence of the detain ing authority. In his affidavit the District Magistrate has	 however	 stated that he made the detention order against the detenu on perusal of the materials	 facts and documents placed before him by the police as he was satisfied that detenu 's detention was necessary for the purpose of mainte nance of public order. He has denied the allegation that the detention order was passed by him under the influence of the Minister. Since the District Magistrate was present on the dias alongwith the Minister and the alleged murderous as sault is alleged to have been made by the detenu in the presence of the detaining authority	 one would expect him to have witnessed the occurrence himself. But it is interesting to note that in paragraph 23 of his affidavit	 the District Magistrate has stated that though he was present on the dias but did not witness the incident as he was concentrating on the proceedings of the Seminar and preparing replies to the querries raised by Speakers at the Seminar. It is difficult to believe the District Magistrate that he could not see the occurrence although he was seated on the dias alongwith the Minister	 on whom murderous assault was allegedly made by the detenu. He is not ready to corroborate the occurrence as presented to him by the sponsoring authority	 namely	 the Police. If the detaining authority was himself present and was an eye witness to the occurrence on the basis of which detention order was made	 it was imperative for the detain ing authority to have honestly and bona fide formed the requisite opinion in making the order of detention on the basis of his own knowledge and perception instead of relying more on the version of the incident as placed before him by the sponsoring authority. In a case where the detaining authority may not be present at the 854 place of the incident or the occurrence	 he has to form the requisite opinion on the basis of materials placed before him by the sponsoring authority but where the detaining authority was himself present at the scene of occurrence he should have relied more on his own observation and knowledge than on the report of the sponsoring authority. In the instant case the detaining authority though present at the scene of occurrence does not support the incident as pre sented to him by the sponsoring authority. In the circum stances	 we are of the opinion that there was non applica tion of mind by the detaining authority in making the im pugned order of detention. In view of the above discussion the detention order is rendered illegal and it is accordingly quashed. R.N.J. Petition allowed.

This petition under Article 32 of the Constitution of India was filed by the wife of the detenu challenging the validity of the Detention Order dated 15.8.1989 passed against her husband by the Collector and District Magistrate of Kamarajar District Virudhunagar	 Tamil Nadu on allega tions inter alia that the District Magistrate had issued the impugned order for detention of her husband	 who is an active member of the All India Anna Drayida Munnetra Kazha gam party	 an active social and political worker and ex member of the Tamil Nadu Legislative Assembly	 at the behest of Respondent No. 3 a Minister in the present DMK Govern ment	 on account of personal and political animosity between the two. Counsel for the Detenu urged two grounds to attack the order of detention. Firstly that the order did not specify the period of detention	 and secondly that the sole ground of detention as reflected in the Grounds of Detention has no relevance to the maintenance of 'Public Order ' as the facts mentioned therein donot make out any case of violation of public order. At best	 it may be a case of law and order only which exhibits non application of mind by the detaining authority. 837 Allowing the writ petition and quashing the impugned order of detention on the ground of non application of mind by the Detaining Authority in passing the Detention order	 this Court	 HELD: (1) Since the Act does not require the detaining authority to specify the period for which a detenu is re quired to be detained the order of detention is not rendered invalid or illegal in the absence of such specification in the Detention order. [843E] Commissioner of Police & Anr. vs Gurbux Anandram Birya ni	 [1988] Supp. SCC 568 Over ruled. Ashok Kumar vs Delhi Administration & Ors.	 	 Ujagar Singh vs The State of Punjab	 ; Suna Ullah Butt vs State of Jammu & Kashmir	 ; ; Suresh Bhojraj Chelani vs State of Maharashtra	 and A.K. Roy vs Union of India & Ors.	 ; 	 approved. (2) In a case where the detaining authority may not be present at the place of the incident or the occurrence	 he has to form the requisite opinion on the basis of materials placed before him by the sponsoring authority but where the detaining authority was himself present at the scene of occurrence he should have relied more on his own knowledge and observation then on the report of the sponsoring author ity. [853H; 854A] In the instant case	 the detaining authority though present at the scene of occurrence does not support the incident as presented to him by the sponsoring authority	 and yet he issued the detention order on the report of sponsoring authority. In these circumstances	 there was nonapplication of mind by the detaining authority in making the order of detention. [854B] Dr. Ram Manohar Lohia vs State of Bihar	 ; ; Pushkar Mukher]ee & Ors. vs The State of West Bengal	 ; ; Shyamal Chakraborty vs Commissioner of Police Calcutta & Anr.	 ; ; Arun Ghosh vs State of West Bengal	 ; Nagendra Nath Mondal vs State of West Bengal	 ; ; Sudhir Kumar Saha vs Commissioner of Police	 Calcutta	 ; ; S.K. Kedar vs State of West Bengal	 ; Kanu Biswas vs State of West Bengal	 ; ; Kishori Mohan vs State of West Bengal	 ; Amiya Kumar Karmakar vs State of West Bengal	 and Manu Bhusan Roy Prodhan vs State of West Bengal & Ors. 	 ; 	 referred to. 838