A player in doubt as to whether use of a device or other equipment would constitute a breach of the Rules should consult the USGA.
A manufacturer should submit to the USGA a sample of a device or other equipment to be manufactured for a ruling as to whether its use during a stipulated round would cause a player to be in breach of Rule 14-3. The sample becomes the property of the USGA for reference purposes. If a manufacturer fails to submit a sample or, having submitted a sample, fails to await a ruling before manufacturing and/or marketing the device or other equipment, the manufacturer assumes the risk of a ruling that use of the device or other equipment would be contrary to the Rules.
The following paragraphs prescribe general regulations for the design of devices and other equipment, together with specifications and interpretations. They should be read in conjunction with Rule 11-1 (Teeing) and Rule 14-3 (Artificial Devices, Unusual Equipment and Unusual Use of Equipment).
A tee is a device designed to raise the ball off the ground. A tee must not:
Gloves may be worn to assist the player in gripping the club, provided they are plain.
A "plain" glove must:
A "plain" glove must not incorporate:
Note: Material may be added for wear resistance, moisture absorption or other functional purposes, provided it does not exceed the definition of padding (see above).
Shoes that assist the player in obtaining a firm stance may be worn. Subject to the conditions of competition, features such as spikes on the sole are permitted, but shoes must not incorporate features:
Articles of clothing must not incorporate features:
During a stipulated round, the use of any distance measuring device is not permitted unless the Committee has introduced a Local Rule to that effect (see Note to Rule 14-3 and Appendix I; Part B; Section 9).
Even when the Local Rule is in effect, the device must be limited to measuring distance only. Features that would render use of the device contrary to the Local Rule include, but are not limited to:
Such non-conforming features render use of the device contrary to the Rules, irrespective of whether or not:
A multi-functional device, such as a smartphone or PDA, may be used as a distance measuring device provided it contains a distance measuring application that meets all of the above limitations (i.e., it must measure distance only). In addition, when the distance measuring application is being used, there must be no other features or applications installed on the device that, if used, would be in breach of the Rules, whether or not they are actually used.