(1) Subject to sub-article (2), where -

(a) a person is concurrently an employed contributor by virtue of section 9(1) and a self-employed contributor in a contribution year, and

(b) the total number of contribution weeks in respect of which self-employment contributions have been paid and the total number of contribution weeks in respect of which employment contributions, (other than an employment contribution paid by virtue section 9 (1) (b)) have been paid, or treated as paid, or have been credited, is less than or in excess of 52, the number of contribution weeks in respect of which self-employment contributions shall be regarded as having been paid shall be determined by deducting the number of contribution weeks in respect of which employment contributions have been paid or credited from 52 and treating the remainder as the number of contribution weeks in respect of which self-employment contributions have been paid.