Issue link: http://itf.uberflip.com/i/447398
43 (b) Clay Court Shoes Players are required to wear tennis shoes generally accepted for play on clay courts or granular surfaces. The Referee has the authority to determine that a tennis shoe's sole does not conform to such customs and standards and can prohibit its use at Davis Cup Ties played on clay courts. Special grass court shoes as described in section (a) above shall not be worn during a match on clay courts. 2. DOUBLES TEAMS Members of doubles teams shall be dressed in substantially the same colours. In the case of Team Identification, this requirement will be satisfied so long as both members of the team display the Nation's name on the back of their shirts and dress in substantially the same colours or both members of the team dress in national colours. 3. TEAM IDENTIFICATION Players and Captains shall be required at all times to dress in compliance with Team Identification principles. To comply, a player and Captain shall display the Nation's name on the back of his shirt or he shall dress in national colours. Team identification shall be in accordance with the official Davis Cup style guide. Please note that this rule is mandatory for teams competing at every level of the Competition. 4. IDENTIFICATION No identification shall be permitted on a player's or Captain's clothing, products or equipment on court during a match or at any press conference or Tie ceremony, except as follows (the ITF reserves the right to interpret the following rules so as to give effect to the intent and purposes of these Rules): (a) Shirt, Sweater, or Jacket (i) Sleeves One (1) commercial (non-manufacturer's) identification for each sleeve, neither of which exceeds four (4) square inches (26 sq.cm), plus one (1) commercial identification of a National Association Team Sponsor on one (1) sleeve, not to exceed four (4) square inches (26 sq.cm), plus one (1) manufacturer's identification on each sleeve, neither of which exceeds eight (8) square inches (52 sq.cm) shall be permitted. If written identification is used within this eight (8) square inches (52 sq.cm) area on either or both sleeves, such written identification may not exceed four (4) square inches (26 sq.cm) per sleeve. Sleeveless The two (2) commercial (non-manufacturer's) identifications permitted on the sleeves above, neither of which shall exceed four (4) square inches (26 sq.cm) in size, and the one (1) commercial identification of a National Association Team