(a) Determination of the fair market value of realty posted as surety for bail in criminal proceedings shall be made (1) For realty located in Wyoming or Sullivan County, by either written appraisal of a license real estate broker or appraiser, or by determination of the fair market value established by that county's assessor, multiplied by the appropriate "common level ration".(2) For realty located in Pennsylvania counties other than Wyoming or Sullivan, by written appraisal of a licensed real estate broker or appraiser.