"revenue"

in relation to persons—

(a) who are in the employment of or have retired or have been discharged from the service of—
(i) the Government, means, subject to subparagraph (iii), the State Revenue Fund;
(ii)the Department of Posts and Telecommunications, means the Post Office Fund;
(iii) a provincial administration, means the provincial revenue fund concerned;
(b) who are in the service of any other organization or body, or have retired or have been discharged from such service, means the moneys or revenue of such organization or body;