Virginia Code Title 59.1. Trade and Commerce § 59.1-503.4. Continuing contractual terms

(a) Terms of an agreement involving successive performances apply to all performances, even if the terms are not displayed or otherwise brought to the attention of a party with respect to each successive performance, unless the terms are modified in accordance with this chapter or the contract.

(b) If a contract provides that terms may be changed as to future performances by compliance with a described procedure, a change proposed in good faith pursuant to that procedure becomes part of the contract if the procedure:

(c) The parties by agreement may determine the standards for reasonable notice unless the agreed standards are manifestly unreasonable in light of the commercial circumstances.

(d) The enforceability of changes made pursuant to a procedure that does not comply with subsection (b) is determined by the other provisions of this chapter or other law.