(a) An employee's contribution for purposes of a policy as to which the policyholder is a trustee or the trustees of a fund established or maintained wholly or partly by the employer is the amount the employee and employer would have been required to contribute to the fund for the employee if:
(1) the work stoppage had not occurred; and
(2) the agreement requiring the employer to make contributions to the fund were in effect.
(b) The policy may provide that continuation of coverage is contingent on the collection of individual contributions by the policyholder or the policyholder's agent.