Original: In 1984, a series of changes in the Pakistan Penal Code sections relating to blasphemy were made, which, in essence, made it illegal for Ahmadis to preach their creed, leading to arrests and prosecutions.
Simplified: In 1984, a series of changes in the Pakistan Penal Code sections relating to blasphemy that, in essence, made it illegal for Ahmadis to preach their religion openly as Islam, leading to arrests and prosecutions.