Execute permission on Procedure

Hi Gurus,

Am new to sqlserver.May you please clarifymy doubt.

Can i give execute  permission to a non existing procedure means there are procedures that will be created later starting with name 'Ba_'.

Can i give execute permission to these withing having in database.And please tell how to give permissions to all procedures starting with 'Ba_'  when they are present.

Please answer.

Thanks in advance,

Venkat.