As per RP07, find details within Flight Crew-->Roster section of IntraCX:
k. Reserve Duty at Home Base, either on the published Roster or assigned directly in place of an O day, totalling in excess of thirty days in a crew member’s Birth Year --> 3.86 hours per Duty during which the crew member was not called out.
l. Reserve Duty, of greater than four hours’ duration, whilst away from Home Base in accommodation provided by The Company. --> 3.86 hours per Duty during which the crew member was not called out.
m. All Reserve Duty other than in K and L above. --> 0 hours per Duty.