4.2.A person holding a valid apprentice competency certificate corresponding to the trade of crane operator and issued under section 2.3 of the Regulation respecting the issuance of competency certificates (chapter R-20, r. 5) is eligible to sit for the prequalification examination relating to the acquisition of the minimum skills required for the apprenticeship of the trade of crane operator, as soon as that person has worked the 150 hours in accordance with section 2.3.