REPUBLIC v. NANA AKUAMOAH BOATENG II; EX PARTE DANSOA AND ANOTHER State proceedings—Mandamus—Application for—Chief—Swearing in of—Whether Omanhene under customary duty to allow new sub-chief swear oath of allegiance to him—Refusal by Omanhene to allow sub-chief to swear oath—Whether mandamus lies against Omanhene—When mandamus available—Constitution, 1979, art. 4.