Final answer:
The required notice period for the Real Estate Commission to check a Broker's files is not indicated in the provided reference information concerning the equal-time rule for broadcast stations. Regulations may vary by state.
Step-by-step explanation:
The question pertains to the procedural requirements of a Real Estate Commission when conducting an inspection or review of a Broker's files. However, the reference information provided relates to the equal-time rule in the context of license maintenance for broadcast stations and political advertising, which is not directly linked to the Real Estate Commission's audit procedures. Therefore, based on the given reference, it's not possible to answer the query about the specific notice period (24, 48, 72, or 96 hours) that the Real Estate Commission must adhere to when checking a Broker's files. It should be noted that such procedures and notice periods can vary depending on state regulations and specific rules set by the Real Estate Commission in each jurisdiction.