Simplify the following text for a Grade 13 native English-speaking person.
Original: The holding of this plebiscite , which India initially supported , was dismissed by India because the 1952 elected Constituent Assembly of Jammu and Kashmir voted in favor of confirming the Kashmir region 's accession to India . Another reason for the abandonment of the referendum is because demographic changes , after 1947 , have been effected in Pakistan-administered Kashmir , as generations of Pakistani individuals non-native to the region have been allowed to take residence in Pakistan-administered Kashmir .
Simplified: India refers to Pakistan-administered Kashmir as Pakistan-occupied Kashmir .