(1) Where the Authority determines that a person satisfies the conditions for enrolment in any pay reference period, the Authority shall assign the last day of that period as the person's enrolment date.

(2) The conditions for enrolment for any pay reference period are -

(a) that on the last day of the pay reference period the person is aged at least 23 years and under 60 years,

(b) that on that day the person is an employee in employment that is not exempt employment, and

(c) that the person's total gross pay in all employments, including exempt employments, in the pay reference period is not less than the earnings threshold.

(3) The earnings threshold for the purposes of subsection (2)(c) is:

(a) where the pay reference period is a year, €20,000;

(b) where the pay reference period is more or less than a year, an amount proportionately more or less than €20,000.