Answer by taking a quote from the following article:

Allan Robert Border AO (born 27 July 1955) is a retired Australian cricketer. A batsman, Border was for many years the captain of the Australian team. His playing nickname was "A.B.". He played 156 Test matches in his career, a record until it was passed by fellow Australian Steve Waugh.

In May 1979, the ACB announced an agreement with WSC, which allowed the WSC players to return to international cricket at the start of the 1979-80 Australian season. In the meantime, Australia made two tours, giving the incumbent players an opportunity to press for places in a reunited team. The first tour, to England for the 1979 Cricket World Cup, ended with Australia being eliminated in the first round. Border scored 59 runs in two innings.  This was followed by a three-month-long, six-Test tour of India, on which Australia failed to win a single match. Border scored 521 runs at 43.42 in the Test series, including 162 in the First Test at Madras, where he displayed excellent footwork and handled the Indian spinners much more effectively than his teammates. As a result of his performances in India, he was one of only three players to retain their places for the 1st Test against West Indies at Brisbane in December 1979, and the 1st Test when the WSC players returned to the official Australian team. In the next test against England at Perth Border scored 115 in the second innings to secure victory and in doing so passed 1,000 Test runs. He had done so in only 354 days, the fastest ever by an Australian, and made more runs (1,070) in his first year as a Test cricketer than anyone before. He was unable to maintain this form, however, and ended the season with 317 runs at 31.70 in six Tests against England and the West Indies.  On the tour of Pakistan that followed, Border hit 150 not out and 153 in the Third Test at Lahore against spinners of the calibre of Iqbal Qasim and Tauseef Ahmed to become the first, and so far only batsmen in Test history to pass 150 in both innings of a Test. In the off-season, Border married Jane Hiscox, and moved to Brisbane to begin playing for Queensland. During the 1980-81 season, he scored 328 runs at 36.44 in six Tests against New Zealand and India, a modest return boosted by a score of 124 against the latter at Melbourne in the final Test of the summer.

What is WSC?