310. The Commission may establish the amount of the assessment of(1) the employer of an independent operator contemplated in section 9, according to the proportion of the price agreed upon for the work he carries out that corresponds to the cost of labour;
(2) the employer of a volunteer worker or the government as employer of a person contemplated in section 11 or 12, according to the minimum wage in force on 31 December of the year during which the work was carried out or the activity engaged in;
(2.1) an authority referred to in section 12, other than the Government, as the employer of a person who participates in activities referred to in that section, according to the minimum wage in force on 31 December of the year during which the activity took place;
(3) the employer of a student contemplated in section 10, as a lump sum determined by it;
(3.1) the authority responsible for a municipal fire safety service as the employer of a person referred to in section 12.0.1, according to the minimum wage in force on 31 December of the year during which the assistance was given;
(4) the employer of a confined person contemplated in section 12.1, according to the minimum wage in force on 31 December of the year during which the work was carried out.