In each even-numbered year, the office shall contract for an actuarial study to determine the reserve sufficiency of funds in the Health Facility Construction Loan Insurance Fund. The study shall examine the portfolio of existing insured loans and shall estimate the amount of reserve funds that the office should reasonably have available to be able to respond adequately to potential foreseeable risks, including extraordinary administrative expenses and actual defaults. Actuarial study contracts shall be exempt from Section 10373 of the Public Contract Code and shall be considered sole-source contracts.