Section 18. Section 28 of the same Act is hereby amended to read as follows:

"SEC. 28.Contributions. — All members who can afford to pay shall contribute to the Fund, in accordance with a reasonable, equitable and progressive contribution schedule to be determined by the Corporation on the basis of applicable actuarial studies and in accordance with the following guidelines: "(a)Members in the formal economy and their employers shall continue paying the same monthly contributions as provided for by law until such time that the Corporation shall have determined a new contribution schedule: Provided, That their monthly contributions shall not exceed five percent (5%) of their respective monthly salaries. "It shall be mandatory for all government agencies to include the payment of premium contribution in their respective annual appropriations: Provided, further, That any increase in the premium contribution of the national government as employer shall only become effective upon inclusion of said amount in the annual General Appropriations Act. "(b)Contributions from members in the informal economy shall be based primarily on household earnings and assets. Those from the lowest income segment who do not qualify for full subsidy under the means test rule of the DSWD shall be entirely subsidized by the LGUs or through cost sharing mechanisms between/among LGUs and/or legislative sponsors and/or other sponsors and/or the member, including the national government: Provided, That the identification of beneficiaries who shall receive subsidy from LGUs shall be based on a list to be provided by the DSWD through the same means test rule or any other appropriate statistical method that may be adopted for said purpose. "(c)Contributions made in behalf of indigent members shall not exceed the minimum contributions for employed members. "(d)The required number of monthly premium contributions to qualify as a lifetime member may be increased by the Corporation to sustain the financial viability of the Program: Provided, That the increase shall be based on actuarial estimate and study."