According to the FIA Act of 1974, who is authorized to arrest someone without a warrant?

According to the FIA Act of 1974, who is authorized to arrest someone without a warrant?

ایف آئی اے ایکٹ 1974 کے مطابق کون کسی کو بغیر وارنٹ گرفتار کرنے کا مجاز ہے۔
Explanation

According to The FIA Act of 1974, anyone not below the rank of a sub-inspector has the power to arrest someone without a warrant with permission from the DG FIA. 

FIA was established under FIA Act, of 1974 promulgated on 13-01-1975.

An arrest under the FIA Act can be made After the commission of an offense and  On reasonable suspicion of the commission of an offense.

A person arrested under FIA Act may be detained at a Police station set up by Police 

SH12-8-2023