The specified period in respect of which specified benefits are recoverable is the period beginning on the date on which the injured person first becomes entitled to a specified benefit as a result of the personal injury and ending on the earliest of the following -
(a) the expiration of the period of 5 years from that date,
(b) the date on which a compensator makes a compensation payment in final discharge of any claim made by or in respect of the injured person as a result of the personal injury, or
(c) the date on which an agreement is made under which agreement an earlier payment is treated as having been made in final discharge of any such claim.