Condition books containing at least three days' racing programs shall be available to horsemen at least 24 hours prior to taking declarations on races contained therein. Conditions for overnight events must be posted at least 18 hours before entries close. Substituted races may be used only when regularly scheduled races fail to fill.
58 Pa. Code § 183.132
This section cited in 58 Pa. Code § 181.1 (relating to definitions).