19.1. During the qualification period, employment designated in Schedule I held temporarily within the meaning of subparagraph 8 of the first paragraph of section 3, with the corresponding classification, becomes pensionable employment under the plan if the employee holds that employment simultaneously with an employment referred to in the first paragraph of section 7, with the same employer and the employer is a regional board, a public institution within the meaning of the Act respecting health services and social services (chapter S-4.2), a private institution within the meaning of section 475 of that Act, a health and social service council or a public institution or private institution under agreement within the meaning of the Act respecting health services and social services for Cree Native persons (chapter S-5). Such employment shall not, however, be taken into account in determining the duration of the qualification period within the meaning of Division III.