SEC. 333. SPECIAL RULES FOR CERTAIN UNMANNED AIRCRAFT SYSTEMS.

(a) IN GENERAL.—Notwithstanding any other requirement of
this subtitle, and not later than 180 days after the date of enactment
of this Act, the Secretary of Transportation shall determine if
certain unmanned aircraft systems may operate safely in the
national airspace system before completion of the plan and rule making required by section 332 of this Act or the guidance required
by section 334 of this Act. H. R. 658—66

(b) ASSESSMENT OF UNMANNED AIRCRAFT SYSTEMS.—In making
the determination under subsection (a), the Secretary shall determine, at a minimum—

(1) which types of unmanned aircraft systems, if any, as
a result of their size, weight, speed, operational capability,
proximity to airports and populated areas, and operation within
visual line of sight do not create a hazard to users of the
national airspace system or the public or pose a threat to
national security; and
(2) whether a certificate of waiver, certificate of authorization, or airworthiness certification under section 44704 of title
49, United States Code, is required for the operation of
unmanned aircraft systems identified under paragraph (1).

(c) REQUIREMENTS FOR SAFE OPERATION.—If the Secretary
determines under this section that certain unmanned aircraft systems may operate safely in the national airspace system, the Secretary shall establish requirements for the safe operation of such
aircraft systems in the national airspace system.

For a more details see FAA Section 333 Explained.
If you want to fill out a request for exception per section 333 go here.