PTAD stands for Permissive Temporary Additional Duty. It is an administrative absence that is approved at the commanders discretion, and it is not an entitlement but rather discretionary, depending on the particular circumstances of the Marine and his/her unit. PTAD is granted for specific occasions, such as transition PTAD for Marines being voluntarily and involuntarily separated from active duty, or PTAD incident to reenlistment.

It is important to note that PTAD has different meanings in different contexts. For example, in Texas, PTAD stands for Property Tax Assistance Division, which provides technical assistance to local governments and taxpayers on property tax issues but does not grant PTAD. In Nigeria, PTAD stands for Pension Transitional Arrangement Directorate, which is responsible for the management of pensions under the old pension scheme for pensioners who did not transit to the new Contributory Pension Scheme.

In summary, PTAD is a term used in the military context to refer to an administrative absence that is granted at the commanders discretion for specific occasions. However, the term may have different meanings in other contexts.