CFR › Title 9 › Part 124Part 124 — Patent Term RestorationSubpart A — General Provisions§ 124.1— Scope.§ 124.2— Definitions.Subpart B — Eligibility Assistance§ 124.10— APHIS liaison with PTO.Subpart C — Regulatory Review Period§ 124.20— Patent term extension calculation.§ 124.21— Regulatory review period determination.§ 124.22— Revision of regulatory review period determination.§ 124.23— Final action on regulatory review period determination.Subpart D — Due Diligence Petitions§ 124.30— Filing, format, and content of petitions.§ 124.31— Applicant response to petition.§ 124.32— APHIS action on petition.§ 124.33— Standard of due diligence.Subpart E — Due Diligence Hearing§ 124.40— Request for hearing.§ 124.41— Notice of hearing.§ 124.42— Hearing procedure.§ 124.43— Administrative decision.