4. Instructional services may be offered by various means. Their purpose is to help persons acquire the occupational competencies leading to:(1) (paragraph revoked);
(2) a Diploma of Vocational Studies, leading to a skilled trade or occupation and, if applicable, to further studies;
(3) an Attestation of Vocational Specialization, leading to a specialization in a particular branch of a trade or occupation and, if applicable, to further studies.