It was granted its Royal Charter in 1837 under King William IV. Supplemental Charters of 1887, 1909 and 1925 were replaced by a single Charter in 1971, and there have been minor amendments since then.
1971 తర్వాత చార్టర్కు చేసిన మార్పుల స్వభావం ఏమిటి?
minor amendments