Each school of aesthetics shall maintain a course of study of not less than 600 hours, extending over a period of a maximum of 160 hours a month. Every school shall maintain regular class hours with a daily schedule.

67 Del. Laws, c. 299, § ?1; 69 Del. Laws, c. 178, § ?1; 73 Del. Laws, c. 158, § ?32; 77 Del. Laws, c. 65, § ?1;