6. An officer to whom paragraph 1 applies may elect to pay to the police authority of the force in which the officer is then serving a sum equal to the amount of that officer’s award by way of repayment of that officer’s aggregate pension contributions under regulation B6 of the 1987 Regulations and to reckon as pensionable service for the purposes of these Regulations the pensionable service the officer was entitled to reckon under the 1987 Regulations at the time of that officer’s retirement with an entitlement to the award.