18N.I.A pension payable by the Northern Ireland Hospitals Authority by virtue of section 2 of the Health Services Act (Northern Ireland) 1958 [1958 c.29] , being a pension which, immediately before 1st April 1959, was a pension payable by the Northern Ireland Tuberculosis Authority under section 9, section 10 or section 11 of the Public Health (Tuberculosis) Act (Northern Ireland) 1946 [1946 c.6] .