Meaning of ALLOW in English
BAD : They also allow to the prisoners to keep birds.
GOOD : They also allow the prisoners to keep birds.
allow sb to do sth (NOT to sb ): 'The principal doesn't allow them to wear jewelry to school.'
BAD : It's not allowed to talk in the library.
GOOD : You aren't allowed to talk in the library.
GOOD : Talking in the library isn't allowed.
It is not usually used as a preparatory subject before (not) allowed , especially in spoken English.
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012