Final answer:
A real estate salesperson can often remain inactive indefinitely, provided they renew their license as required by the state's regulations.
Step-by-step explanation:
A real estate salesperson may elect to remain inactive for varying periods depending on the regulations set by the specific real estate commission or licensing board in their state. However, in most cases, there is no explicit maximum duration, and they may usually remain inactive indefinitely as long as they continue to renew their license according to state requirements.