(a) Every district attorney first elected or appointed to his or her position on or after November 8, 2016 shall come under this division by operation of law. Each district attorney shall contribute to the fund eight and one-half percent (8.5%) of his or her annual salary. The percentages shall be deducted by the employer from each district attorney's salary and paid into the fund in the State Treasury and credited to the individual account of the district attorney from whose salary it was deducted.
(b) On account of each member there shall be paid monthly by the employer an amount equal to a certain percentage of the annual salary of each member to be the employer's contribution. The percentage rate of such contribution shall be fixed for each fiscal year on the basis of the liabilities as shown by the last annual actuarial valuation, and such percentage rate as established by such valuation shall take effect the following October 1 and continue in effect for the fiscal year. Such contribution shall be made by the Office of the District Attorney who employs the member.