Central government authority over pension distinctions allows differentiated treatment of pensioners based on pay commission recommendations and operative dates. Central Government may establish distinctions among pensioners guided by Central Pay Commission recommendations and prescribed norms, principles and method; distinctions may be based on retirement date or the date an accepted recommendation becomes operational and may affect pension claims and liabilities. Pension revision under an accepted recommendation takes effect from a date determined by the Central Government and benefits shall not be given effect from an earlier date.