Are there any restrictions on the eligibility for employment after leaving service in a Public Service Commission?
Yes, there are restrictions on the eligibility for employment after leaving service in a Public Service Commission. According to section 319 of the Indian Constitution:

(a) The Chairman of the Union Public Service Commission shall be ineligible for further employment either under the Government of India or under the Government of a State.

(b) The Chairman of a State Public Service Commission shall be eligible for appointment as the Chairman or any other member of the Union Public Service Commission or as the Chairman of any other State Public Service Commission, but not for any other employment either under the Government of India or under the Government of a State.

(c) A member other than the Chairman of the Union Public Service Commission shall be eligible for appointment as the Chairman of the Union Public Service Commission or as the Chairman of a State Public Service Commission, but not for any other employment either under the Government of India or under the Government of a State.