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.
If youâre aged between 14 and 26, you need to provide proof of ID (ID card, passport). If you are a minor, you must also provide parental permission. For those in receipt of a bursary and aged between 14 and 26, proof of status is required.