(

a) In addition to other records and accounts, the board shall keep records and accounts necessary to compute at any time:

(1) The total accumulated contributions of members.

(2) The total accumulated contributions of retired members and of deceased members, to or on account of whom payments involving life contingencies are paid, less the annuity payments made to the members.

(3) The accumulated contributions of the state, school employers, and of contracting agencies held for the benefit of members on account of current service.

(4) All other accumulated contributions of the state, school employers, and of contracting agencies, which shall include the amounts available to meet the obligation of the state, school employers, and of the contracting agencies, respectively, on account of benefits that have been granted to, or on account of, retired and deceased employees and on account of prior service of members. (

b) For the purposes of this section, all employers subject to

Chapter 9 (commencing with

Section 20790) shall be deemed to be a single account with respect to their local miscellaneous members, all other employers not subject to

Chapter shall be deemed to be a single account with respect to their local miscellaneous members, all employers of local safety members shall be deemed to be a single account with respect to those local safety members, and all employers of school members shall be deemed to be a single account with respect to those school members. However, the purposes of this

section shall be construed in conformity with the individual employer contribution rates established pursuant to

Section 20815.