4. The date is—
(a)for the purposes of a claim under regulation 3, the first day falling on or after the relevant date on which the reservist in respect of whom the claim is made is an employee of the employer making the claim; and
(b)for the purposes of a claim under regulation 4, the first day falling on or after the relevant date on which the reservist in respect of whom the claim is made is carrying on business in partnership with the partner making the claim.