An employment tribunal shall not consider a complaint under section 145A or 145B unless it is presented—
before the end of the period of three months beginning with the date when the offer was made or, where the offer is part of a series of similar offers to the complainant, the date when the last of them was made, or
where the tribunal is satisfied that it was not reasonably practicable for the complaint to be presented before the end of that period, within such further period as it considers reasonable.
Section 292A (extension of time limits to facilitate conciliation before institution of proceedings) applies for the purposes of subsection (1)(a).