ILO Convention No. 138 (1973) concerns the abolition of child labour. The minimum age for admission to employment or work shall be not less than the age of completion of compulsory schooling (normally not less than 15 years). The ratifying ILO Member State undertakes to pursue a national policy designed to ensure the effective abolition of child labour and to raise progressively the minimum age for admission to employment or work to a level consistent with the fullest physical and mental development of young persons. The minimum age to be specified in conformity with the Convention shall not be less than the age of completion of compulsory schooling and, in any case, shall not be less than 15 years. Developing countries may initially specify a minimum age of 14 years. The minimum age shall not be less than 18 years  or 16 years under certain conditions  for any type of employment or work that is likely to jeopardize the health, safety or morals of young persons. The Convention provides that limited categories of employment or work may be excluded from its application where special and substantial problems of application arise. The Convention does not apply to work done in schools for general, vocational or technical education or in other training institutions. Young persons of 13 to 15 years of age  or at least 15 years of age who have not yet finished their compulsory schooling may be permitted to carry out light work of certain types and under certain conditions to be determined. Exceptions may be authorized in individual cases for such purposes as participation in artistic performances. Organizations of employers and workers, where such exist, shall be consulted regarding the above-mentioned measures. The Convention revises ten earlier Conventions in the same field. See: Child; Child labour; Worst forms of child labour. An OSH glossary used in safety and health at work which is, adopted by ILO