Meaning of “irregular employment”
17.—(1) For the purposes of these Regulations, an employment is an irregular employment if the contract of employment requires the employee—
(a)to be available for work for the period specified in the contract of employment; and
(b)to undertake and be remunerated for work during that period only when so required by the employer.
(2) A person in pensionable service in relation to an irregular employment is in pensionable service for the period specified in the contract of employment.