Inability of an individual or a group to perform the given tasks up to the established standards. http://www.businessdictionary.com/definition/deficiency-performance.html.
TSA Requirements. The TSA requires that adult passengers ages 18 and older show valid photo ID at the security checkpoint. Children, however, are not required to present such identification. This does not mean, however, that children will be able to fly without it.
Acceptable Forms of Identification. All travelers flying on a domestic flight must present a photo ID issued at the state or federal level, such as a driver's license, military ID or United States passport.lthough airline passengers under age 18 are not required to present a photo ID when flying, all adults must present an acceptable form of identification before passing through the TSA screening checkpoint and being allowed to board their aircraft.