a. Burglary defined. A person is guilty of burglary if, with purpose to commit an offense therein or thereon he:
(1) Enters a research facility, structure, or a separately secured or occupied portion thereof unless the structure was at the time open to the public or the actor is licensed or privileged to enter;
(2) Surreptitiously remains in a research facility, structure, or a separately secured or occupied portion thereof knowing that he is not licensed or privileged to do so; or
(3) Trespasses in or upon utility company property where public notice prohibiting trespass is given by conspicuous posting, or fencing or other enclosure manifestly designed to exclude intruders.
b. Grading. Burglary is a crime of the second degree if in the course of committing the offense, the actor:
(1) Purposely, knowingly or recklessly inflicts, attempts to inflict or threatens to inflict bodily injury on anyone; or
(2) Is armed with or displays what appear to be explosives or a deadly weapon.
Otherwise burglary is a crime of the third degree. An act shall be deemed “in the course of committing” an offense if it occurs in an attempt to commit an offense or in immediate flight after the attempt or commission.