Summarize the following court judgment. ivil Appeal Nos.1756 59 of 1991. From the Judgment and Order dated 17.1.1990 of the Allahabad High Court in C.M.W.P. Nos.10962	10901	 10902 and 10903 of 1987. Raju Rama Chandran for the Appellants. Prem Malhotra for the Respondents. The Judgment of the Court was delivered by K.JAGANNATHA SHETTY	J. We grant Special Leave and proceed to dispose of these appeals. These appeals preferred against the decision of the Allahabad High Court raise common questions as to the scope of Regulations 17(2) and 17(3) of the U.P. State Road Transport Corporation Employees (Other than officers) Service Regulations	 1981 (`the Regulations '). 277 The respondents were appointed as drivers in the erstwhile U.P. Government Roadways. Upon the formation of the U.P.State Road Transport Corporation (`Corporation ') they were absorbed in the services of the Corporation. The Corporation has framed the Regulations inter alia prescribing medical test to drivers every year for the purpose of assessing their suitability for the job. Pursuant to these Regulations	 the Managing Director of the Corporation issued a circular dated December 19	1986 stating that all drivers should be medically examined and those found unsuitable either because of ill health or poor eye sight	 be not given duty and their services be dispensed with. This was followed by another circular dated March 12	 1987 by which the Managing Director directed the Regional Managers to terminate the services of the drivers who are medically found unfit to drive the vehicles. It was also directed in the circular that such employees whose services are dispensed with should be paid benefits like retrenchment compensation under Section 6(N) of the U.P. Industrial Act. In the beginning of 1987	 all the respondents were subjected to medical examination and it was found that their eye sights were defective. In view of the medical report	 the Corporation discharged them with immediate effect by paying them one month salary in lieu of notice and also retrenchment compensation under the Industrial Disputes Act. The respondents challenged their retrenchment by means of writ petitions before the Allahabad High Court. The High Court has allowed the writ petitions directing the Corporation to offer alternative jobs to the respondents. The Corporation being aggrieved by the decision of the High Court has appealed to this Court. Regulations 17(2) and 17(3) read as follows: "17(2) A person	 appointed to the post of driver	 will be required to undergo medical test	 particularly vision test	 every year or at such intervals as may be prescribed by the General Manager from time to time. 17(3) The service of a person who fails to pass the fitness test	 referred to in the sub regulation (2)	 may be dispensed with: 278 Provided that the persons	 whose services are so dispensed with may	 in the discretion of the Corporation	 be offered alternative job. " Regulation 17(2) requires that the drivers have to undergo medical test particularly vision test every year	 or at such intervals as may be prescribed by the General Manager of the Corporation. Regulation 17(3) has two branches. The first branch provides power to the Corporation to remove the driver from the service who fails to pass the medical test. The second branch of Regulation 17(3) though styled as proviso also appears to be an independent branch. It is not proviso. The proviso ordinarily carves out an exception from the general rule enacted in the main provision. However	 sometimes the insertion of a proviso by the draftsman is not strictly adhered to its legitimate use and it may be in substance a substantive provision adding to and not merely excepting something out of or qualifying what goes before it. The proviso with which we are concerned in Regulation 17(3) does not carve out an exception from the general rule contained in the first branch. It is an independent and substantive provision providing discretion to the Corporation to offer an alternative job to the retrenched driver. This offer is to be made after the exercise of power under the first branch of Regulation 17(3). There is therefore	 no doubt that the second branch of Regulation 17(3) is a substantive provision and not in the nature of a proviso to first branch thereof. The first branch of Regulation 17(3) appears to be in the public interest. The driver who is found medically unfit to drive the vehicle on the public road certainly cannot be permitted to continue as a driver. His driving licence is liable to be revoked. His continuance as driver would	 perhaps be perilous to the interests of passengers and pedestrians. The Corporation therefore	 has been empowered to remove him from service as driver. At the same time	 the second branch to Regulation 17(3) shows concern for the person who has been removed from service for want of medical fitness. It confers discretion on the Corporation to offer him an alternative job. What does this mean in practical terms? Does it mean that the retrenched driver has a statutory right to get an alternative job? Is it obligatory for the Corporation to offer an alternative job to the driver who is certified to be medically unfit for the driver 's job? The High Court has expressed the view that the Corporation before terminating the service of a driver who fails to satisfy the medical test	 is obliged to offer him an alternative job and that offer shall be in writing. In other 279 words	 the High Court seems to be of the opinion that the proviso to Regulation 17(3) imposes an obligation on the Corporation to offer an alternative job to all those who are found medically unfit to carry on their duties in the existing jobs. The view taken by the High Court appears to be fallacious. The discretion conferred by Regulation 17(3) confers no vested right on the retrenched workmen to get an alternative job in the Corporation. Like all other statutory discretion in the administrative law	 Regulation 17(3) creates no legal right in favour of a person in respect of whom the discretion is required to be exercised other than a right to have his case honestly considered for an alternative job by the Corporation. The High Court was equally in error in directing the Corporation to offer alternative job to drivers who are found to be medically unfit before dispensing with their services. The Court cannot dictate the decision of the statutory authority that ought to be made in the exercise of discretion in a given case. The Court cannot direct the statutory authority to exercise the discretion in a particular manner not expressly required by law. The Court could only command the statutory authority by a writ of mandamus to perform its duty by exercising the discretion according to law. Whether alternative job is to be offered or not is a matter left to the discretion of the competent authority of the Corporation and the Corporation has to exercise the discretion in individual cases. The Court cannot command the Corporation to exercise discretion in a particular manner and in favour of a particular person. That would be beyond the jurisdiction of the Court. In the instant case	 the Corporation has denied itself the discretion to offer an alternative job which the regulation requires it to exercise in individual cases of retrenchment. As earlier stated	 the Managing Director has issued two circulars: (i) dated December 19	 1986 and (ii) dated March 12 1987 directing the Regional Managers to dispense with the services of the drivers who are found to be medically unfit to drive the vehicles. It is directed in the circulars that such drivers should be paid benefits like retrenchment compensation which they are entitled to under the U.P.Industrial Disputes Act. The circulars thus leave no scope for exercising discretion to consider the individual cases of retrenched drivers for any alternative job. It may be stated that the statutory discretion cannot be fettered by self created rules or policy. Although it is open to an authority to which discretion has been entrusted to lay down the norms or rules to regulate exercise 280 of discretion it cannot	 however	 deny itself the discretion which the statute requires it to exercise in individual cases. The concerned authority of the Corporation therefore	 notwithstanding the said circulars are required to consider the cases of retrenched drivers for alternative jobs. Counsel for the respondents argued that the object of Regulation 17(3) was to rehabilitate the drivers who are found to be medically unfit to drive vehicles and it is therefore	 obligatory for the authority or Officer of the Corporation to exercise discretion in favour of such drivers by offering them alternative jobs. But counsel for the Corporation considers that it is an absolute discretion of the Corporation to offer or not to offer an alternative job to such drivers and there is no compulsion in the matter. These are	 in our opinion	 extreme contentions which are not sustainable under law. There are two aspects to be borne in mind in exercising the discretion. Firstly	 there are constraints within which the Corporation has to exercise its discretion. The Corporation is a public utility organisation where medicating motion is efficiency and effectiveness of public service. Efficiency and effectiveness of public service are the basic concepts which cannot be sacrificed in public administration by any statutory corporation. The Corporation has to render this public service within the resource use and allocation. It is within these constraints the Corporation has to exercise its discretion and perform its task. The second aspect relates to the manner in which the statutory discretion is to be exercised. The discretion allowed by the statute to the holder of an office	 as Lord Halsbury observed in Sharp vs Wakefield	 at 179 is intended to be exercised "according to the rules of reason and justice	 not according to private opinion; according to law and not humor. It is to be	 no arbitrary	 vague and fanciful but legal and regular. And it must be exercised within the limits to which an honest man competent to the discharge of his office ought to confine himself." Every discretion conferred by statute on a holder of public office must be exercised in furtherance of accomplishment of purpose of the power. The purpose of discretionary decision making under Regulation 17(3) was intended to rehabilitate the disabled drivers to the extent possible and within the above said constraints. The Corporation therefore	 cannot act mechanically. The discretion should not be exercised according to whim	 caprice or ritual. The discretion should be exercised reasonably and rationally. It should be exercised faithfully and impartially. There should be proper value judgment with fairness and equity. Those drivers would have served 281 the Corporation till their superannuation but for their unfortunate medical unfitness to carry on the driver 's job. Therefore	 it would not be improper if the discretion is exercised with greater concern for and sympathetic outlook to the disabled drivers subject of course to the paramount consideration of good and efficient administration. These are some of the relevant factors to be borne in mind in exercising the discretion vested in the Corporation under Regulation 17(3). In the result we allow these appeals. In reversal of the judgment of the High Court	 we direct the Corporation to consider the cases of respondents in the light of the observations made. In the circumstances of the case	 however	 we make no order as to costs. D.R.L. Appeals allowed.

The respondents were employed as drivers in the U.P.State Road Transport Corporation. The Corporation has framed the U.P.State Road Transport Corporation Employees (other than Officers) Service Regulations	 1981	 Regulations 17(2) inter alia requires the drivers to undergo medical test particularly vision test every year and under Regulation 17(3) services of those drivers who fail to pass the fitness test are to be dispensed with	 with the proviso that such drivers may	 in the discretion of the Corporation	 be offered alternative jobs. Pursuant to these Regulations	 the Managing Director of the Corporation issued two circulars dated December 19	 1986 and March 12	 1987 directing the Regional Managers to terminate the Services of the drivers who are medically found unfit to drive the vehicles with the further direction that such drivers should be paid benefits like retrenchment compensation under Section 6(N) of the U.P.Industrial Disputes Act. The respondents were subjected to medical examination and it was found that their eye sights were defective. Consequently	 the Corporation discharged the respondents with immediate effect by paying them one month salary in lieu of notice and also retrenchment compensation under the U.P. Industrial Disputes Act. The respondents challenged their retrenchment by means of writ petitions before the High Court. The High Court allowed the writ petitions directing the Corporation to offer alternative jobs to the respondents. Being aggrieved	 the Corporation has preferred these appeals to this Court. Allowing the appeals	 the Court	 275 HELD: 1. Regulation 17(2) requires that the drivers have to undergo medical test particularly vision test every year	 or at such intervals as may be prescribed by the General Manager of the Corporation. Regulation 17(3) has two branches. The first branch provides power to the Corporation to remove the driver from the service who fails to pass the medical test. The second branch of Regulation 17(3) though styled as proviso is an independent and substantive provision providing discretion to the Corporation to offer an alternative job to the retrenched driver. [278B D] 2. The discretion conferred by Regulation 17(3) confers no vested right on the retrenched workmen to get an alternative job in the Corporation. Like all other statutory discretion in the administrative law	 Regulation 17(3) creates no legal right in favour of a person in respect of whom the discretion is required to be exercised other than a right to have his case honestly considered for an alternative job by the Corporation. [279B] 3. The High Court was in error in directing the Corporation to offer alternative jobs to the respondents because the Court cannot direct the statutory authority to exercise the discretion in a particular manner not expressly required by law and that it could only command the statutory authority by a writ of mandamus to perform its duty by exercising the discretion according to law. The Court cannot command the Corporation to exercise discretion in a particular manner and in favour of a particular person. That would be beyond the jurisdiction of the Court. [279E] In the instant case	 the Corporation has denied itself the discretion to offer an alternative job which the regulation requires it to exercise in individual cases of retrenchment. Although it is open to an authority to which discretion has been entrusted to lay down the norms or rules to regulate exercise of discretion	 it cannot however deny itself the discretion which the statute requires it to exercise in individual cases. The concerned authority of the Corporation therefore are required to consider the cases of retrenched drivers for alternative jobs.[279F G;280A] 4.1 There are two aspects to be borne in mind in exercising the discretion. Firstly	 there are constraints with which the Corporation has to exercise its discretion and perform its task. The Corporation is a public utility organisation where mediating motion is efficiency and effectiveness of public service. Efficiency and effectiveness of public 276 service are the basic concepts which cannot be sacrificed in public administration by any statutory corporation. The Corporation has to render this public service within the resource use and allocation.[280D] 4.2 The second aspect relates to the manner in which the statutory discretion is to be exercised. Every discretion conferred by statute on a holder of public office must be exercised in furtherance of accomplishment of purpose of the power. [280E G] Sharp vs Wakefield	 at 179	 referred to. The Corporation therefore cannot act mechanically. The discretion should not be exercised according to him	 caprice and ritual. The discretion should be exercised reasonably and rationally. It should be exercised faithfully and impartially. There should be proper value judgment with fairness and equity. [280H] Therefore	 it would not be improper if the discretion is exercised with greater concern for and sympathetic outlook to the disabled drivers subject of course to the paramount consideration of good and efficient administration. [281A B]