The use of “if” vs. “to the extent” is something we often consider closely in commercial contracting. “If” creates a contingency under which a clause will either be triggered or not be triggered by a certain event. “To the extent” may apply to the degree the event is applicable at all. For example, the sentence “Vendor will comply with the policies and procedures of Customer to the extent reasonably practicable” means that the Vendor will have to comply to each and every of the policies and procedures that are individually reasonably practicable while the sentence “Vendor will be subject to the policies and procedures of Customer if reasonably practicable” means that the Vendor will have to comply to the policies and procedures that are collectively reasonably practicable.