Section 1037.7 - Initial and subsequent assessments(a) On a date to be determined by the department following the effective date of this article, employers who are self-insurers as of that effective date shall pay an initial assessment of one-half per centum of the compensation paid by each self-insurer in the year preceding the assessment. Self-insurers who, prior to such effective date, were not self-insurers shall pay an assessment based on one-half per centum of their modified manual premium for the twelve (12) months immediately prior to becoming self-insurers.(b)(1) The department may, in addition to the initial assessment, from time to time, assess each self-insurer a pro rata share of the amounts needed for the fund to carry out the requirements of this article.(2) Such assessments shall be based on the ratio that each self-insurer's payments of compensation bears to the total compensation paid by all self-insurers in the year preceding the year of assessment.(3) In no event shall a self-insurer be assessed in any one calendar year more than one per centum of the compensation paid by that self-insurer during the previous calendar year.(c) A self-insurer which ceases to be a self-insurer shall be liable for any and all assessments made pursuant to this section during the period following the date its authority to self-insure is withdrawn, revoked or surrendered until such time as it has discharged all obligations to pay compensation which arose during the period of time said former self-insurer was self-insured. Assessments of such a former self-insurer shall be based on the compensation paid by the former self-insurer during the preceding calendar year on claims that arose during the period of time said former self-insurer was self-insured.1915, June 2, P.L. 736, No. 338, §907, added 1993 , July 2, P.L. 190, No. 44, § 20, effective in 120 days.