(a) In lieu of contributions required to be paid by employers under this act, the Commonwealth of Pennsylvania shall pay into the Unemployment Compensation Fund an amount equal to the amount of regular benefits and of one-half of the extended benefits paid, (after December 31, 1978 the full amount of extended benefits paid) that is attributable to service in the employ of the Commonwealth and all its departments, bureaus, boards, agencies, commissions and authorities.

(b) The amount which the Commonwealth shall pay into the Unemployment Compensation Fund, as hereinabove set forth, shall be computed by the department and reported quarterly to the State Treasurer who shall thereupon pay such amount from the General Fund of the Commonwealth, upon approval thereof in accordance with the law then in effect, except that to the extent that compensation is paid on the basis of wages paid by an authority of the Commonwealth from its funds such authority shall pay such amount into the Unemployment Compensation Fund from its own funds.

(c) Past due payments of amounts in lieu of contributions, or reports with respect thereto, shall be subject to the same interest and penalties that, pursuant to section 308¹ apply to past due contributions and section 206² apply to past due reports.