153. A pensioner who returns to pensionable employment under this plan or who holds pensionable employment under the Government and Public Employees Retirement Plan becomes, notwithstanding section 4, an employee covered by this plan and is a member thereof.
The payment of a pensioner’s pension and any benefit under subparagraphs 7 and 8 of the first paragraph of section 97 shall cease while the pensioner holds or returns to the pensionable employment referred to in the first paragraph and the pensioner’s pension is, at the time the pensioner ceases to hold that employment, recomputed in accordance with section 155, and sections 157 and 158 apply.