As determined by the Director (Director, NIST Boulder Laboratories, for sites in Colorado), the site may be closed to the public in emergency situations and at such other times as may be necessary for the orderly conduct of the Government's business. At such times no person shall enter the site except authorized individuals, who may be required to sign a register and display identification when requested by a uniformed guard.

No person shall come onto the site other than in pursuance of official government business or other properly authorized activities.

No person shall, without authorization, willfully destroy, damage, or deface any building, sign, equipment, marker, or structure, tree, flower, lawn, or other public property on the site.

No person shall fail or refuse to comply with officially posted signs of a prohibitory nature or with directions of a uniformed guard.

(a) No person shall willfully disrupt the conduct of official business on the site, or engage in disorderly conduct; nor shall any person unreasonably obstruct the usual use of entrances, foyers, lobbies, corridors, offices, elevators, stairways, parking lots, sidewalks, or roads.

(b) No person shall litter or dispose of rubbish except in a receptacle provided for that purpose; nor shall any person throw articles of any kind from a building or from a motor vehicle or bicycle.

Except as expressly authorized by the Director, the consumption or use on the site of intoxicating beverages is prohibited.

The possession, sale, consumption, or use on the site of narcotic or other drugs illegal under the laws of the State in which the particular site is situated is prohibited. The provisions of this section are not intended to preclude the applicability of any State or local laws and regulations with respect to the possession, sale, consumption, or use of narcotic or other drugs.

No person shall enter or remain on the site while noticeably impaired by the use of intoxicating beverages or narcotics or other drugs, and any such person found on the site in such a state of impairment may be removed from the site.

Except in connection with the conduct of official business on the site, no person other than uniformed guards specifically authorized, or other Federal, State, or local law enforcement officials so authorized, shall carry, transport, or otherwise possess on the site, firearms whether loaded or not, other dangerous or deadly weapons or materials, or explosives, either openly or concealed, without the written permission of the Director or his designee.

No person shall discriminate against any other person because of race, creed, color, sex, or national origin, in furnishing, or by refusing to furnish to such person the use of any facility of a public nature, including all services, privileges, accommodations, and activities provided thereby on the site.

No person shall participate on the site in games for money or other property, or in the operation of gambling devices, the conduct of lotteries or pools, or in the selling or purchasing of numbers tickets, or the taking or placing of bets.

(a) Except as otherwise provided herein or where security regulations would preclude, photographs may be taken in entrances, lobbies, foyers, corridors, and auditoriums without prior approval. Photography for advertising and commercial purposes may be conducted only with the written permission of the Chief, Public Affairs Division of the National Institute of Standards and Technology (Public Affairs Officer for Boulder for sites in Colorado,) provided, however, that this shall not apply to photography for purposes of civic promotion.

(b) Commercial advertisements and other material which are not directly pertinent or applicable to NIST employees but which nevertheless may be of interest or benefit to them may, with the approval of the Director of Administration (Executive Office, Boulder, for sites in Colorado), be placed in an appropriate location and made available to employees who visit that area. Except with approval as provided herein, no person shall distribute commercial advertising literature or engage in commercial soliciting on the site.

Except in connection with the conduct of official business on the site or with the approval of the Associate Director for Administration (Executive Officer, IBS/Boulder, for sites in Colorado), no person shall bring upon the site any cat, dog, or other animal, provided, however, that blind persons may have the use of seeing eye dogs.