16. Entry and exit of vaccinated animals into controlled and free areas. -Notwithstanding anything contained in section 10, an animal belonging to the species of animals in respect of which an area has been declared as a controlled or free area in relation to any scheduled disease, which has been duly vaccinated against that disease, shall be allowed to enter into or be taken out of the controlled area or free area, or to be taken out of any other place on the production of a certificate to the effect that vaccine against that disease has been administered and a period of not less than twenty-one days has elapsed thereafter. | 