<Dl> <Dt> Intermediate Certificate ("Inter Cert") </Dt> <Dd> introduced in 1924; originally for pupils at voluntary secondary schools (often boarding schools) after 3 or 4 years' study </Dd> <Dt> Group, or Day Vocational, Certificate ("Group Cert", or "Day Cert") </Dt> <Dd> introduced in 1947 for pupils at vocational schools after 2 years' study </Dd> </Dl> <Dt> Intermediate Certificate ("Inter Cert") </Dt> <Dd> introduced in 1924; originally for pupils at voluntary secondary schools (often boarding schools) after 3 or 4 years' study </Dd> <Dt> Group, or Day Vocational, Certificate ("Group Cert", or "Day Cert") </Dt>

When did the intercert become the junior cert