The surety bond or letter of credit shall be maintained until (i) the granting of a deed to the unit, (ii) the purchaser's default under a purchase contract for the unit entitling the declarant to retain the deposit, or (iii) the refund of the deposit to the purchaser, whichever occurs first.
For the purposes of determining the amount of any blanket letter of credit that a declarant maintains in any calendar year, the total amount of deposits considered held by the declarant shall be determined as of May 31 in each calendar year and the amount of the letter of credit shall be in accordance with the amount of deposits held as of May 31.
Va. Code § 55.1-1983