(1) Has attained the age of sixteen (16) years, and who is regularly engaged in any useful and lawful employment or service during the time the public schools are in session, and who holds an employment certificate issued according to law;

(2) Has been examined by an approved mental clinic or by a person certified as a public school psychologist or psychological examiner, and has been found to be unable to profit from further public school attendance, and who has been reported to the board of school directors and excused, in accordance with regulations prescribed by the State Board of Education;

(3) Has attained the age of fifteen (15) years and is engaged in farm work or domestic service in a private home on a permit issued by the school board or the designated school official of the school district of the child's residence, in accordance with regulations which the Superintendent of Public Instruction¹ is hereby authorized to prescribe;

(4) Has attained the age of fourteen (14) years and is engaged in farm work or domestic service in a private home on a permit issued as provided in clause (3) of this section, and who has satisfactorily completed, either in public or private schools, the equivalent of the highest grade of the elementary school organization prevailing in the public schools of the district in which he resides, if the issuance of such a permit has first been recommended by the district superintendent of schools having supervision of the schools of the district where such child resides, or by the principal of the private school where such child is enrolled, and the reason therefor has been approved by the Superintendent of Public Instruction;

(5) Except in districts of the fourth class and those of the third class located wholly within the boundary lines of a township, or within the boundary lines of a borough which has a population of less than five hundred (500) inhabitants to the square mile, resides two miles or more by the nearest public highway from any public school in session and no proper free transportation is furnished to such child to and from school.