Q: If an employee resigns and is rehired within a month, are there any specific regulations under the Holiday Act regarding entitlements or service continuity that we should consider, if there are no policies in place? Or should they always be treated as a new starter in these cases and start accruing them again?

A: No. The act only covers if the employer dismisses an employee and rehires within a month, then employment is continuous.  If the employee resigns this does not apply so they would be treated as a new starter.