of whose international matches are deemed to have Test status. In 1970, a series of five "Test matches" was played in England between England and a Rest of the World XI: these matches, originally scheduled between England and South Africa, were amended after South Africa was suspended from international cricket due to their government's apartheid policies. Although initially given Test status and included as Test matches in some record books, including Wisden Cricketers' Almanack, this was later withdrawn, and a principle was established that official Test matches can only be between nations (note that the geographically and demographically small countries of the West Indies have, since 1928, fielded a coalition side). Despite this principle, in 2005, the ICC ruled that the six-day Super Series match that took place that October between Australia and a World XI was an official Test match: some cricket writers and statisticians, including Bill Frindall, have ignored the ICC's ruling and exclude this match from their records. The series of "Test matches" played in Australia between Australia and a World XI in 1971–72, and the commercial "Supertests" organised by Kerry Packer as part of his World Series Cricket enterprise played between "WSC Australia", "WSC World XI" and "WSC West Indies" from 1977 to 1979, have never been regarded as official Test matches as of 2021. Conduct of the game Playing time A standard day of Test cricket consists of three sessions of two hours each, the break between sessions being 40 minutes for lunch and 20 minutes for tea. However, the times of sessions and intervals may be altered in certain circumstances: if bad weather or a change of innings occurs close to a scheduled break, the break may be taken immediately; if there has been a loss of playing time, for example because of bad weather, the session times may be adjusted to make up the lost time; if the batting side is nine wickets down at the scheduled tea break, then the interval may be delayed until either 30 minutes has elapsed or the team is all out; the final session may be extended by up to 30 minutes if 90 or more overs have not been bowled in that day's play (subject to any reduction for adverse weather); the final session may be extended by 30 minutes (except on the 5th day) if the umpires believe the result can be decided within that