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.
Minors Under 15 Years of Age. There is no minimum age for passport requirement; even babies must have their own for international air travel. All individuals under 16 years of age must apply for passports in person, according to the U.S. Department of State, and be accompanied by both parents or guardians.