466. The budgetary rules referred to in sections 464 and 465 may provide that the granting of a subsidy may be made(1) on the basis of general standards applicable to all those eligible or on the basis of special standards applicable to only some of them;
(2) subject to general conditions applicable to all those eligible or to special conditions applicable to only one or some of them;
(3) subject to authorization by the Minister;
(4) to only one or some of those eligible.