Source document: https://docs-lawep.s3.us-east-2.amazonaws.com/1697803408296.pdf (India)
F.R.

56(a) Except as otherwise provided in this rule, every servant shall retire from service on the afternoon of Government the last day of the month in which he attains the age of sixty years: Provided that a Government servant whose date of birth is the first of a month shall retire from service on the afternoon of the last day of the preceding month on attaining the age of sixty years.
Provided further that a Government servant who has attained the age of fifty-eight years on or before the first day of May, 1998 and is on extension in service, shall retire from the service on expiry of his extended period of service.

Or on the expiry of any further extension in service granted in public interest, provided that no in service shall be granted beyond the age of 60 by the Central Government such extension years.
(b) A workman who is governed by these rules shall retire from service on the afternoon of the last day of the month in which he attains the age of sixty years.

(bb) The age of superannuation in respect of specialists included in the Teaching, Non-Teaching and Public Health Sub- cadres of Central Health Service shall be 62 years. "
Provided that for the specialists included in the Teaching sub-cadres of the Central Health Service who are engaged only in teaching activities and not occupying administrative positions, the age of superannuation shall be sixty-five years: Provided further that such specialists of the Teaching sub-cadre of Central Health Service who are occupying administrative positions shall have the option of seeking appointment to the teaching positions in case they wish to continue in service up to sixty-five years."
(d) No Government beyond the age of retirement of sixty years: servant shall be granted extension in service Provided that a Government servant dealing with budget work or working as a full-time member of a Committee which is to time may be granted be wound up within a short period of in extension of service for a period not exceeding three months public interest; Provided further that a specialist in medical or scientific fields may be granted extension of service up to the age of sixty- two years, public interest and the if such extension is in grounds for such extension are recorded in writing: Provided also that an eminent scientist of international stature may be granted extension of service up to the age of 64 years, if such extension is in public interest and the grounds for such extension are recorded in writing.
the extension of service before Provided also that the Appropriate Authority shall have the right to the expiry of such terminate extension by less than three or a quasi-permanent months Government servant, on, of one month in the case of a temporary Government servant, or pay and allowances in lieu of such notice.
giving a notice in writing of not case of a permanent in the Provided also that notwithstanding anything contained in any rule, the Central Government may, if considered necessary in public interest so to do, give extension in service to a Cabinet Secretary in the Central Government for such period or periods as it may deem proper subject such Cabinet Secretary does not exceed three years: to the condition that his total term as Provided also that the Central Government may, it considers necessary in public interest so to do, give extension in service to the Defence Secretary, Home Secretary, Director, Intelligence Bureau, Secretary, Research and Analysis Wing and Director, Central Bureau of Investigation for such periods as it may deem proper on case-to-case basis, subject to the condition that the total incumbents of the above posts, who are given such extension in service, does not exceed two years.
term of the if the Central Government may, if considers it necessary, Provided also that notwithstanding anything contained in the fifth in proviso, public interest, so to do, give an extension in service for a further period not exceeding three months beyond the said period of two years to the Home Secretary and the Defence Secretary.
"Provided also that, the Central Government may, if considered necessary in public interest so to do, give extension of service to the Secretary, Department of Space and the Secretary, Department of Atomic Energy, for such period or periods as it may deem proper subject to a maximum age of 66 years."