This is an exempt from LASORS section F8
For single-engine turbine helicopters with a MTOM <3175 kg, the proficiency check in accordance with JAR-FCL 2.245 (b)(1) is only required on one of the applicable types held, provided that the applicant has:-
i. completed at least 300 hours as pilot in command of helicopters; and
ii. completed 15 hours as pilot on each of the type(s) to which that revalidation proficiency check shall carry across, and
iii. completed at least 2 hours as pilot-in-command flight time on each of the other type(s) during the validity period to which that revalidation proficiency
check shall carry across;
The proficiency check shall always be performed on the type least recently used for a proficiency check, unless an individual written permission has been given by the Authority.
To me this is a reasonable regulation at least for SET. I am sure if you have flown less than 2 hours on a type within a year, even on a FAA ticket you would get some familiarisation again before an operator lets you go on your own and not everybody on a FAA and/or JAA ticket has x thousand hours and y hundred on type.