Wherever necessary for proper administration of important government functions, the Governor in his discretion may designate one Assistant Commissioner in the Department of Public Works, one Assistant Commissioner in the Department of Education, one Assistant Commissioner of the Department of Finance and one Assistant Attorney General, whose salaries shall be increased by a sum not to exceed $2,000 per annum. The Governor likewise may designate the Director of the Division of Hospitals and Medical Services in the Department of Health as Assistant Commissioner of Health for the Virgin Islands and in such case the salary of this position shall be increased by a sum not to exceed $2,000 per annum and the position shall remain in the Classified Service.