Section 1721 - Professional examination(a) The Board shall require written and/or clinical professional examination of each applicant for a certificate to practice medicine in accordance with the Board's rules and regulations.(b) A professional examination issued pursuant to this section must be in the English language, must be comprehensive in character, and must be designed to determine an applicant's fitness to practice medicine. It must cover those general subjects and topics, a knowledge of which is commonly and generally required of candidates for the degree of Doctor of Medicine or Doctor of Osteopathy conferred by approved medical colleges or schools in the United States.(c) The Board shall include in its rules and regulations the number of times and the conditions under which an applicant who has failed 1 or more professional examinations conducted pursuant to this section may again apply for a certificate to practice medicine under this chapter. 20 Del. Laws, c. 40, § 11; Code 1915, § 844; Code 1935, § 923; 24 Del. C. 1953, § 1735; 50 Del. Laws, c. 369, § 1; 60 Del. Laws, c. 462, § 1; 75 Del. Laws, c. 141, § 1.;