This International Standard lays down basic specifications to be considered when initial plans are prepared for building or renovating built-in booths for simultaneous interpretation in new or existing buildings. It is applicable to all types of built-in booths with built-in or portable equipment. NOTE 1 Mobile booths for simultaneous interpretation are specified in ISO 4043. In designing new buildings, booths should be optimally integrated into the structure so that the conference room and the booths constitute a well-balanced unit. Design should also provide daylight for the conference hall and booths. The requirements of clauses 4 and 5 apply to booths with built-in equipment, as defined in 3.1, and booths with portable equipment, as defined in 3.2. The dimensional requirements apply equally to semi-permanent booths, as defined in 3.3, for which all other requirements should apply as far as is possible. In addition to structural and design specifications, this International Standard specifies those components of typical conference facilities which form the interpreters working environment. NOTE 2 Clause 12 gives indications concerning the use of public address systems in conjunction with simultaneous interpretation systems.