FI Rating On Indian Cpl From Philippines Fi Rating

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Hi All,
Pls Tell Me That What Is The Requirement And Procedure Of Getting FI Rating On Indian Cpl , From FI Rating On Philippines Cpl ..if One Already Has Indian Cpl...
Do We Need To Give Any Exams , Or Special Permission From Dgca Before Getting Fi Rating From Phil..

Also, What Is The Minimum Requirement (hours, Age Etc) For Appearing In Dgca Atpl Exams.. And For How Long Is It Valid..
Thanks