Notwithstanding any other provisions of law, in order to improve the economic use of the personal services of his employees, the Architect of the Capitol is authorized on and after October 12, 1979, to assign and reassign, without increase or decrease in basic salary or wages, any person on the employment rolls of his Office, for personal services in any buildings, facilities or grounds under his jurisdiction or for personal services in connection with any project under his jurisdiction for which appropriations have been made and are available, whenever such action, in his opinion, will be most advantageous to the interest of or result in either specific or overall savings to the Government. Exceptions may be made where there are differences in equipment. No assignment or reassignment of personnel by the Architect of the Capitol pursuant to this provision shall operate in any respect to augment or decrease any general or specific appropriation.