Summarize the following court judgment. ivil Appeal Nos. 4483 & 4484 of 1986 From the Judgment and Order dated 26.6.86 of the Bombay High Court in Notice of Motion No. 1418/86 in Appeal No. 512/86 in W.P. 1007/86. F.S. Nariman	 O. Chenoy	 A.K. Verma	 D.N. Mishra and D.N. Bhansaria for the Appellant. Soli J. Sorabjee	 M.M. Jayakar and B.R. Aggarwala for the Respondents. 935 The Judgment of the Court was delivered by VENKATARAMIAH	 J. These appeals by special leave are filed against the Order dated 26.6.1986 passed in Appeal No. 512 of 1986 in Writ Petition No. 1007 of 1986 and the Order dated 26.6.1986 in Appeal No. 535 of 1986 in Writ Petition No. 1424 of 1986 of the High Court of Bombay. Since these two are connected matters	 they are disposed of by this common judgment. The facts of these two cases are these. The appellant in both these appeals is the Board of Trustees of the Port of Bombay (hereinafter referred to as 'the Port Trust ') and the 1st Respondent in both these appeals is a partnership firm by name M/s. Jai Hind Oil Mills Company. The 1st Respondent imported 5 consignments of Propylene of 10 metric tons each in January	 1986 by S.S. Maribor. The general landing date of the said consignments was 20th January	 1986 and the last free date in respect of them was 23rd January	 1986. There after the said consignments were incurring demurrage. The bills of entry were submitted by the 1st Respondent to the Customs authorities in the same month. Disputes arose be tween the 1st Respondent and the Customs authorities with regard to the basic customs duty payable in excess of 32.50% (as goods were imported from the Republic of Korea which was a developing country)	 with regard to loading the assessable value with customs duty for calculation of the additional duty and with regard to loading the CIF value with the landing charges. Not being satisfied with the contentions of the Customs authorities the 1st Respondent filed a writ petition in Writ Petition No. 122 of 1986 for the issue of certain directions to the Customs authorities with regard to the levy of customs duty. In that Writ Petition on January 21	 1986 the High Court passed an interim order which di rected the Customs authorities not to insist on payment of the customs duty in dispute pending hearing and disposal of the Writ Petition on the 1st Respondent furnishing a Bank Guarantee to the extent of the 90 per cent of the disputed amount of duty in respect of one item and 100 per cent of the disputed amount of duty in respect of two other items in favour of the Collector of Customs. Thereafter some corre spondence ensued between the 1st Respondent and the Customs authorities in connection with the description of the above goods. It would appear that while the Bill of Lading and the Invoice described the goods as 'Propylene ' the marks on the consignments indicated that they contained 'Polypropylene '. The 1st Respondent was asked to explain the discrepancy by the Customs authorities. There was also some dispute raised as regards the invoice price. The 1st Respondent could not	 however	 clear the goods 936 from the Port of Bombay. Thereafter the 1st Respondent filed another Writ Petition No. 519 of 1986 for the issue of a direction to the Customs authorities to permit it to clear the consignments. On April 2	 1985 the learned Single Judge of the High Court of Bombay who heard the said Writ Petition passed an order allowing the 1st Respondent to dear the consignments on furnishing an Import Trade Control bond for the value of the consignments calculated at the rate of U.S $ 735 per metric ton and furnishing a Bank Guarantee of a nationalised bank in favour of the Collector of Customs	 Bombay to the satisfaction of the Prothonotary & Senior Master	 High Court	 Bombay	 for a sum equivalent to the difference in the value between U.S $ 7 15 and U.S $ 735 per metric ton without prejudice to the rights and contentions of the 1st Respondent. The said order provided that the Customs authorities could continue their investigation and adjudicate upon the duty payable by the 1st Respondent. On the basis of the above order the 1st Respondent was allowed to withdraw the Writ Petition with liberty to file a fresh petition	 if required. Since there was a delay in the clear ance of the consignments in question and the 1st Respondent had become liable to pay demurrage to the Port Trust	 the 1st Respondent addressed a letter to the Collector of Cus toms	 Bombay asking him to issue a Detention Certificate stating that the goods had been detained for bona fide Import Trade Control formalities so that it could claim the remission of demurrage payable to the Port Trust. The 1st Respondent followed up the above letter by another Writ Petition No. 1007 of 1986 which was filed on or about the 17th April	 1986 against the Customs authorities for the issue of a writ directing them to issue a Detention Certifi cate in respect of all the 5 consignments. On the 24th April	 1986 the learned Single Judge passed a final order directing the Customs authorities to issue a Detention Certificate to the 1st Respondent on the 1st Respondent giving an undertaking to the Court that it would pay the amount	 if it failed in Writ Petition 122 of 1986. Pursuant to the Order ' dated 24th April	 1986 passed in Writ Petition No. 1007 of 1986 the 1st Respondent gave an undertaking to the Court that it would pay the amount upon its not succeed ing in Writ Petition No. 122 of 1986. On the 21st May	 1985 the Port Trust received a letter dated 19th May	 1986 from the Assistant Collector of Customs in which it had been stated inter alia that five Detention Certificates had been sent along with the said letter. Actually no enclosures were received along with the said letter. But later on they received two Detention Certificates in respect of two out of the five consignments on that day. They related to two bills of entry bearing Nos. 3133/219 and 3 133/220. On the same day the Docks Manager of the Port Trust received a letter from the clearing agent of the 1st Respondent asking 937 the Port Trust to grant the remission of demurrage in view of the Detention Certificates issued by the Customs authori ties. Since the Port Trust was not a party to any of the Writ petitions	 referred to above; and no Bank Guarantee or Demand Draft had been furnished by the 1st Respondent cover ing the 80% amount of the demurrage fees	 the Port Trust wrote a letter dated 30th May	 1986 to the 1st Respondent asking the 1st Respondent to give a Bank Guarantee to the effect that in the event. of the 1st Respondent losing Writ Petition No. 122 of 1986 it would pay to the Port Trust	 Bombay the entire amount of remission along with interest at 15% per annum. When the aforesaid letter was sent	 the Port Trust was not aware of the Order dated 2nd April	 1986 passed in Writ Petition No. 519 of 1986. Thereupon	 on June 12	 1986 the 1st Respondent and its partner Sham Lal Kishna ni	 who is 2nd Respondent herein filed another Writ Petition No. 1424 of 1986 in the High Court against the Port Trust for quashing the communication dated 30th May	 1986	 re ferred to above	 under which the Port Trust had asked the 1st Respondent to furnish the Bank Guarantee or a Demand Draft to the extent of 80% of the demurrage fees claimed by the Port Trust and for compelling the Port. Trust to honour the Detention Certificates issued by the Customs authorities pursuant to the Order dated 24th April	 1986 and to permit the clearance of the goods without payment of demurrage and without insisting upon the furnishing of a Bank Guarantee or a Demand Draft	 as stated above. They also asked for an interim order of the effect that pending hearing and final disposal of the said Writ Petition	 the Port Trust should forthwith honour the Detention Certificates issued by the Customs authorities and allow the clearance of the goods without payment of demurrage and without insisting on the Bank Guarantee or the Demand Draft. In that Writ Petition an interim order was passed on the 17th June	 1986 as prayed for by the 1st Respondent. Thereafter the Port Trust was advised to file an appeal before the Division Bench against the Order dated 2nd April	 1986 passed in Writ Petition No. 519 of 1986 and the Order dated 17th June	 1986 passed in Writ Petition No. 1424 of 1986. While the Port Trust was in the process of getting the said appeals made ready for filing by their advocates	 the 1st Respondent threatened the Port Trust with contempt proceedings by its letter dated 20th June	 1986. Immediately after the receipt of the said letter	 the Port Trust lodged the Appeal No. 512 of 1986. By an order dated 26th June	 1986 the appeal filed against the Order dated 2nd April	 1986 passed in the Writ Petition No. 1007 of 1986 was summarily dismissed. The said order	 howev er	 stated as under: "It is	 however	 clarified that it is clear from the im pugned 938 order dated 24.4.1986 that the undertaking pertains to the demurrage charges payable to the Port Trust. if the Respond ents Nos. 1 and 2 (Petitioners) failed in Writ Petition No. 122 of 1986 on the footing that no valid detention certifi cate could have been issued in that event. Mr. Chinoy contends that the detention certificate could not be issued	 if in the adjudication proceedings the Petitioners are found at fault and the question of the Petitioners giving an undertaking to provide for this does not appear to have been present in the mind of the learned Judge when the order was passed. Liberty to the Appellants 'to seek further clari fication and/or orders on this question from the learned Single Judge. " The appeal filed against the Order dated 17th June	 1986 in Writ Petition No. 1424 of 1986 was numbered as Appeal No. 535 of 1986. The said appeal was also summarily dismissed on 26th June	 1986. As the Port Trust was advised to file an appeal in this Court by special leave	 the Port Trust did not apply to the learned Single Judge for clarification as suggested in the Order passed in Appeal No. 512 of 1986. It may be mentioned at this stage that the remaining three Detention Certificates relating to Bills of Entry Nos. 3133/221	222 and 223 were received by the Port Trust from the Customs authorities on 3rd July	 1986. Two out of the five consignments were cleared by the 1st Respondent on 3rd July	 1986 and the remaining three consignments were cleared by the 1st Respondent on 5th July	 1986 on payment of an aggregate amount of Rs.49	510/50 paise for the charges of the Port Trust in accordance with the Order dated 17th June	 1986 passed in Writ Petition No.1424 of 1986 as against a total amount of Rs.3	53	514.75 paise due to the Port Trust for wharfage and demurrage charges upto the dates of the clearance of goods. Thus a sum of Rs.3	04	004.25 in respect of wharfage and demurrage charges of the said five consign ments remains unpaid to the Port Trust. Aggrieved by the two orders passed on 26th June	 1986 in Appeal No. 512 of 1986 and Appeal No. 535 of 1986 the Port Trust has filed these two appeals by special leave. 939 The principal contention urged in both these appeals is that the High Court should not have directed the Customs authorities to issue Detention Certificates without the Port Trust being made a party to the Writ Petition and in any event without passing an order duly providing for the pay ment of the wharfage and demurrage charges due to the Port Trust in the event of the 1st Respondent failing in its contention in Writ Petition No. 122 of 1986. It is urged that a mere undertaking given in favour of the High Court agreeing to pay the amount was not sufficient security for the amount due to the Port Trust in the event of the 1st Respondent being held to be the party in default. It is further contended that the High Court committed an error in directing the 1st Respondent to give a Bank Guarantee only in respect of the Customs duty payable by the 1st Respondent in the event of its Writ Petition being dismissed and in not making a similar order directing the 1st Respondent to furnish a Bank Guarantee in respect of the wharfage and demurrage charges payable to the Port Trust in the event of the 1st Respondent being ultimately held as the party in default. The Port Trust is constituted under the (hereinafter referred to as the Act). Under Section 5 of the Act every Board constituted under it is declared to be a body corporate having perpetual succession and a common seal with power	 subject to the provisions of the Act	 to acquire	 hold or dispose of property and it may be the name by which i.t is constituted	 sue or be sued. The affairs of the Port Trust are managed by the Board of Trus tees and committees appointed by it in accordance with the provisions of the Act. It is thus an independent statutory body and not just a department of Government. Under Chapter VI of the Act the Board of Trustees of a Port Trust is empowered to impose and recover rates at Ports	 for services rendered by the Port Trust or other persons at the port under its jurisdiction. Sections 48 to 65 of the Act which are in Chapter VI of the Act deal with the said power of the Board of Trustees. Section 48 authorises a Board from time to time to frame a scale of rates at which and a statement of the conditions under which	 any of the services specified thereunder shall be performed by itself or any person autho rised by it at the port or port approaches. Clause (d) of section 48 specifically empowers the Board to impose rates in respect of wharfage	 storage or demurrage of goods on any such place. Every scale of rates and every statement of conditions framed by the Board under the foregoing provi sions are required to be submitted to the Central Government for sanction and will have effect when so sanctioned and published by the Board in the Official Gazette. It is	 however	 provided in section 53 of the Act that the Board of Trustees in special 940 cases and for reasons to be recorded in writing	 may exempt either wholly or partially any goods or vessels or class of goods or vessels from the payment of any rate or of any charge leviable in respect thereof according to any scale in force under the Act or remit the whole or any portion of such rate or charge so levied. The Port Trust has fixed the scale of rates charged at the docks. A booklet containing the said rates which are revised upto 10.1.1985 is produced before the Court. Section III of the said booklet which commences at page 14 thereof contains the Docks scale of rates ' fixed by the Port Trust. In consultation with the Customs authorities	 the Port Trust has provided for the grant of concession in the matter of payment of demurrage charges on the issue of Detention Certificate by the Customs authorities. Section III A(c) of the said booket deals with the demurrage fees chargeable by the Port Trust. Proviso (d) to the said clause (c) states that the goods detained by the Customs Department for special examination 'involving ana lytical or technical tests other than the ordinary processes of appraisement ' will be exempt from demunage fees during such period of detention as may be certified by the Collec tor of Customs to be not attributable to fault or negligence on the part of importers or exporters plus two working days and that the Certification by the Customs will be given by endorsement on relative duplicate copies of Bills of Entry or Shipping Bills. On the suggestion of the Customs Depart ment the Port Trust has accepted to allow concession in the matter of demurrage charges to the extent indicated in Paragraph 4.10 of the note which is enclosed as Ext. 'B ' to the Special Leave Petition (Civil) No. 8466 of 1986. It reads thus: "4.10 The best course seems to be to charge a rate per day which corresponds to our minimum charge for handling	 stor age	 care and custody or the goods after the expiry of the free days. Wharfage constitutes handling costs plus storage charges for a period of four days. Deducting handling costs	 the balance represents storage charges for a period of four days. It is estimated that	 excluding the handling costs	 storage charges per day are equal to 20% of total wharfage. is	 therefore	 suggested that for the entire period of certified detention we may retain per day 20% of the wharf age to cover the services referred to herein. " The above concession is extended by the Port Trust in appropriate cases where Detention Certificates are issued by the Customs authorities. The Customs authorities have laid down the procedure for issue of Detention Certificates and the current procedure in 941 regard to the issue of Detention Certificates is embodied in the Bombay Custom House Public Notice No.111 dated 29th July	 1985. Paragraph 2.of the said notice sets out the circumstances under which a regular Detention Certificate could be issued by the Customs House for facilitating the importers to get remission of demurrage charges. They are as under: "(a) Where the goods are detained by Custom House for bona fide operation of Import Control Formalities without any default on the part of the importers. (b) Where the goods have been released on caution (a regular Detention Certificate and not a Recommendatory letter). (c) Where	 the goods are detained the Custom House pending test report and the facility of clearance against provisional assessment has not been allowed. Such Detention Certificates will be issued on merits for the period for which the goods were detained for the purpose. (d) Where	 the goods are detained for PHO formalities	 the certificate will cover the period stretching between the date of drawal of the sample by the PHO and the date of his test results	 and (e) In cases where samples have been drawn from the imported consignments by the Asstt. Drug/Controller for ensuring compliance with the provisions of Drugs and Cos metics Act	 1940 and where the Assistant Drugs Controller is of the opinion that release cannot be allowed against a Letter of Guarantee pending test. " The said Public Notice also states that Detention Cer tificates will not be issued in the following types of cases: (a) "Time taken by the Custom House Laboratory for analytical/chemical testing of samples drawn from the con signments	 since the facility of clearing the goods on bond in terms of Section 18 already exists. (b) Samples drawn from the imported consignments by the 942 Assistant Drugs Controller for ensuring compliance with the provisions of and for being forwarded to the Central Drugs Laboratory	 Calcutta	 as the importers can avail of the facility of clearing the goods against Letters of Guarantee and need not wait till the receipt of the test report. The facility of allowing clearance of goods against letters of Guarantee is extended only on the specific recom mendations of the Assistant Drugs Controller on the Bill of Entry in each case. (c) The period taken for mutilation of woollen rags in the Docks. (d) Cases where goods are detained in the ordinary course of appraisement such as for determination of the Tariff classification of goods or their assessable value in terms of Section 14 of the Customs Act. " It is agreed between the Customs authorities and the Port Trust that no Detention Certificate would	 however	 be issued by the Customs Department if there has been any default on the part of the importer or exporter. It is thus clear that in the event of the importer or exporter being at fault	 he would not be entitled to any concession in the matter of demurrage charges. He has to pay whatever is payable in accordance with the 'scale of rates ' charged at the docks as fixed by the Port Trust. The power of a Port Trust to fix rates of demurrage and to recover the same from an importer or exporter (although the question of an exporter paying demurrage arises rarely) under law and to show concession as regards demurrage charges in certain specified cases is recognised by this Court in the Trustees of the Port of Madras vs M/s. Amin chand Pyarelal & Others	 ; and in the Board of Trustees of the Port of Bombay versus Indian Goods Sup plying Co.; 	 These decisions are no doubt based on the relevant laws which were in force at the mate rial time. But the decisions are still relevant insofar as cases arising under the Act because the Act also contains provisions more or less similar to the statutory provisions considered in the said decisions. Demurrage charges are levied in order to ensure quick clearance of the cargo from the harbour. They are always fixed in such a way that they would make it unprofitable for 943 importers to use the port premises as a warehouse. It is necessary to do so because congestion in the ports affects the free movement of ships and the loading and unloading operations. As stated earlier. the Port Trust shows conces sion to the party concerned in certain types of cases. In the instant case the High Court by the order passed in the writ petition to which the Port Trust was not a party directed the Customs authorities to issue Detention Certifi cates in respect of the consignments in question. In doing so while the High Court had safeguarded the interests of the Customs authorities by. its earlier orders by directing the 1st Respondent to furnish a Bank Guarantee in respect of the duty payable to them	 in respect of the demurrage charges payable to the Port Trust the High Court merely directed an undertaking to be given in favour of the High Court. In the ordinary course	 the High Court should have directed the 1st Respondent to furnish Bank Guarantee in respect of the demurrage charges payable to the Port Trust in the event of the 1st Respondent being held to be in default ultimately. It is	 however	 to be observed that before compelling the Customs authorities to issue a Detention Certificate	 the High Court should have issued notice to the Port Trust which was vitally interested in securing its own interests as regards the demurrage charges recoverable by it under law. This was necessary because on the production of the Detention Certificate issued by the Customs authorities the Port Trust was under an obligation to permit the clearance of the goods without payment of full demurrage charges. If ultimately the party concerned is found to be at fault and becomes liable to pay the full demurrage charges the Port Trust may not be in a position to recover such full demur rage charges from the party concerned	 since it would have no longer any lien as provided by section 59 of the Act on the goods which are already cleared The Port Trust being a body corporate constituted under the Act is entitled to be heard by the Court before any order which affects its inter ests prejudicially is passed. This case serves as an illus tration to what is stated above. The Port Trust has been asked to permit the clearance of goods in respect of which demurrage charges of Rs.3	53	5 14.75 paise are payable in the event of the 1st Respondent being held liable in law to pay the full demurrage charges. The orders passed by the High Court in the proceedings to which the Port Trust was not a party which had the effect of prejudicially affecting the interests of the Port Trust would not be binding on it in view of the violation of the principles of natural jus tice. The High 944 Court erred in not imposing any condition on the 1st Re spondent for protecting the interests of the Port Trust even in the Writ Petition to which it was a party. The impugned orders are contrary to the public notice issued by the Customs authorities as well as the rules of the Port Trust. Having regard to the peculiar circumstances of this case in which the goods have already been cleared	 the orders of the High Court of Bombay against which these appeals are filed are	 therefore	 to be modified appropriately in order to protect the interests of the Port Trust. Accordingly	 at the conclusion of the hearing of these appeals we passed an order on 16.12.1986 before reserving the appeals for judg ment directing the 1st Respondent to furnish within eight weeks a Bank Guarantee of a Nationalised Bank in favour of the appellant for due payment of Rs.3	04	004.25 paise to the appellant on demand	 without any demur	 being the balance of wharfage and demurrage charges in the event of the 1st Respondent not succeeding ultimately in Writ Petition No. 127 of 1986 and on failure to furnish such Bank Guarantee within eight weeks to pay in cash Rs.3	04	004.25 paise to the appellant forthwith. This shall be the final order in these appeals. These appeals are disposed of in the above terms. The Customs authorities shall complete the adjudication proceed ings as expeditiously as possible and in any event within 16.3.1987. P.S.S. Appeals disposed of.

The empowers by cl.(d) of s.48 the Board of Trustees	 constituted under that Art	 to impose rates in respea of wharfage	 storage or demurrage of goods at the port. Section 53 of the Act empowers and Board in special cases to exempt either wholly or partially any ' goods from payment of any rate or of any charge leviable in respect thereof or remit the whole or any portion of such rate or charge so levied. The Port Trust had in consultation with the Customs authorities provided for grant of conces sion in the matter of payment of demurrage charges on the issue of detention certificate by the latter. Paragraph 2(a) of the Bombay Customs House Public Notice No. 111 dated 29th July	 1985 provides for a regular deten tion certificate to be issued where the goods are detained by the Customs House for the bona fide operation of import control formalities. A dispute arose between the 1st respondent and the Customs authorities with regard to the basic customs duty payable on the goods imported by the former. By an interim order passed in a writ petition filed by the respondent	 the High Court directed the Customs authorities to allow clear ance of the consignments on respondent furnishing a bank guarantee in respect of the disputed amount of duty payable	 in favour of the Collector of Customs. The respondent	 however	 failed to clear the goods from the Port. Since the consignments were incurring demurrage the respondent filed another writ petition seeking a direction to the Customs authorities 933 to issue detention certificates	 which was allowed by the Court on the 1st respondent giving an undertaking that it would pay the demurrage amount if it failed in the earlier writ petition. The Customs authorities were	 thus	 obliged to issue the detention certificates. The Port Trust was not made party to any of the writ petitions. It refused to honour the detention certificates and to grant remission of demurrage unless the respondent gave a bank guarantee to the extent of 80 per cent of the fees claimed. The High Court	 however	 by an interim order	 in the writ petition filed against the Port Trust	 directed the clearance of goods without payment of demurrage and without insisting on the bank guarantee. The appeals filed against the aforesaid orders were summarily dismissed by the High Court. In the appeals by special leave	 it was contended for the appellantPort Trust	 that the High Court should not have directed the Customs authorities to issue detention certifi cates without the Port Trust being made a party to the writ petition and in any event without passing an order duly providing for the payment of the wharfage and demurrage charges due to the Port Trust in the event of the first respondent failing in its contention	 and that the High Court had committed an error in directing the first respond ent to give a bank guarantee only in respect of the customs duty payable and not making a similar order with regard to wharfage and demurrage charges payable to the Port Trust. Disposing of the appeals	 the Court	 HELD: 1. The power of the Port Trust to fix rates of demurrage and to recover the same from an importer and to show concession as regards demurrage charges in certain specified cases has been recognised. [942F G] Trustees of the Port of Madras vs M/s. Aminchand Pyare lal & Others; 	 and The Board of trustees of the Port of Bombay vs Indian Goods Supplying Co.	 ; 	 referred to. 2.1 The orders passed by the High Court in the proceed ings to which the Port Trust was not a party	 were not binding on the Port Trust in view of the violation of the principles of natural justice. [943G H] 2.2 The Port Trust being a body corporate constituted under was entitled to he heard by the Court 934 before any order which affected its interests prejudicially was passed. The High Court	 therefore	 before compelling the Customs authorities to issue a detention certificate should have issued notice to the Port Trust. This was necessary because on the production of that certificate the Port Trust was under on obligation to permit the clearance of the goods without payment of full demurrage charges. If ultimately the party concerned was found to he at fault and become liable to pay the full demurrage charges the Port Trust in the absence of a bank guarantee would not be in a position to recover full demurrage charges from the party concerned since it would have no longer any lien as provided by s.59 of the Act on the goods which were already cleared. [943D F] 3. The orders of the High Court in the proceedings to which the Port Trust was a party were contrary to the public notice issued by the Customs authorities as well as the rules of the Port Trust. It erred in not imposing any condi tion on the first respondent for protecting the interests of the Port Trust. It should have directed the first respondent to furnish bank guarantee in respect of the demurrage charges payable to the Port Trust in the event of the first respondent being held to be in default ultimately	 rather than merely directing an undertaking to be given in favour of the High Court. [943B D] 4. The goods having already been cleared	 to protect the interests of the Port Trust the order passed on December I6	 1986 directing the first respondent to furnish bank guaran tee in favour of the appellant with regard to the balance of wharfage and demurrage charges and in default thereof to pay the amount in cash would be the final order in the matter. The customs authorities to complete the adjudication pro ceedings expeditiously and within March 16	 1987. [944B E]