Step 1: Understanding arrest without warrant.
CrPC allows police to arrest a person without warrant when the offence is cognizable.
Step 2: Relevant provision.
Section 41 CrPC specifically empowers police to arrest without warrant in cases where a person commits, or is suspected of committing, a cognizable offence.
Step 3: Conclusion.
Therefore, Section 41 CrPC is the governing provision for arrest without warrant.