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.
Children ages 12 and younger may use the TSA PreâÂ® lane when traveling with a parent or guardian who has the indicator on their boarding pass. Travelers 13 and older who do not have a TSA PreâÂ® boarding pass must go through standard security lanes or apply.