Final answer:
The OF-346 is a form used by the U.S. government to certify an individual's security clearance. According to the NAVFAC P-300, which is the manual for the U.S. Navy Facilities Engineering Command, the OF-346 typically expires after 5 years.
Step-by-step explanation:
The NAVFAC P-300 is a document that provides management practices for Naval Facilities Engineering Command. According to the NAVFAC P-300, the OF-346, which is also known as the U.S. Government Motor Vehicle Operator's Identification Card, typically expires after 3 years from the date of issuance.
It is always advised to check the most current documentation or confirm with relevant authorities, as policies can be subject to change. However, it is important to note that the expiration date can vary depending on individual circumstances and agency policies.