91.—(1) Subject to paragraph (2), Article 90(1) does not prevent forfeiture of a person's entitlement[F1 to a pension under an occupational pension scheme or right to a future pension under such a scheme] by reference to the person having incurred some monetary obligation due to the employer and arising out of a criminal, negligent or fraudulent act or omission by the person.
(2) A person's entitlement[F1 right] may be forfeited by reason of paragraph (1) to the extent only that it does not exceed the amount of the monetary obligation in question, or (if less) the value (determined in the prescribed manner) of the person's entitlement or[F1 right].
(3) Such forfeiture as is mentioned in paragraph (1) must not take effect where there is a dispute as to the amount of the monetary obligation in question, unless the obligation has become enforceable under an order of a competent court or in consequence of an award of an arbitrator.
(4) Where a person's entitlement or[F1 right] is forfeited by reason of paragraph (1), the person must be given a certificate showing the amount forfeited and the effect of the forfeiture on his benefits under the scheme.
(5) Where such forfeiture as is mentioned in paragraph (1) occurs, an amount not exceeding the amount forfeited may, if the trustees or managers of the scheme so determine, be paid to the employer.