Original: The memorial is managed by the Jallianwala Bagh National Memorial Trust, which was established as per the Jallianwala Bagh National Memorial Act passed by the Government of India in 1951.
Simplified: The memorial is managed by Jallianwala Bagh National Memorial Trust, which was established as per Jallianwala Bagh National Memorial Act passed by Government of India in year 1951.