Element of Competency includes the competencies required to be acquired by a person in his /her occupational environment. Therefore, it refers to an action, a behavior or a result that a worker needs to demonstrate and, thus, it is a task that is carried out by one individual. The Element of competency includes the description of a task that should be carried out by workers / trainees in their occupational environment. Therefore, it refers to an action that a worker needs to demonstrate and, thus, it is the ability to carry out a task by an individual.
Source: Content developed by Moustafa Wahba, Thread: RE: Questions on TVET, 18 March 2009
Source: Wahba 2013, Global

Any of the basic building blocks of a unit of competency which describe the key activities that must be performed to demonstrate competence in the tasks covered by the unit.
Source: NCVER 2013, Australia