True or False: Certification becomes invalid if expired for more than 6 months past the renewal date.

The statement is true because certification in many professional contexts, including septic installation, typically requires periodic renewal to ensure that individuals remain knowledgeable about current practices, regulations, and technologies. When a certification has been expired for more than six months past the renewal date, it is considered invalid, meaning the individual cannot legally perform tasks that require that certification until they have successfully renewed it. This ensures public safety and the integrity of the profession by ensuring that all certified individuals are up-to-date with the latest standards and practices.

Other choices would not hold because simply failing to renew does not indicate that the certification could still be considered valid, nor do special circumstances generally apply to allow an expired certification to remain valid beyond the six-month grace period. This rule emphasizes the importance of timely renewal and continuing education within the profession.