States was able to establish some significant mark on the competition setting in future years a very high standard for others to compete against. The first Federation Cup had attracted 16 entry teams, despite no prize money and teams having to meet their own expenses. When sponsorship became available, the number of teams expanded dramatically, first by the Colgate Group in 1976, and, from 1981 to 1994 by the Japanese communications and computer giant NEC. In 1994, there were 73 nations competing, with the host nation of a Federation Cup week was now being required to build a special tennis complex, giving rise to what became known as the Federation Cup "legacy." The additional costs of each event could be offset with the host nations viewing their involvement as providing an opportunity to boost their national game. For the 1992, a regional group qualifying format was introduced. In 1995, the tournament's name was shortened to the Fed Cup, and a new home-and-away format was adopted as trialled by the Davis Cup, so that women could play for their country in their own country. There have been a number of smaller changes to the format since 1995. The format change implemented in 2005 incorporates an eight Nation World Group I and eight nation World Group II both playing home-and-away over three weekends throughout the year. Three regional groups compete and there are promotions and relegations based on results. The 2021 edition is set to have US$12 million in prize money. After the 2022 Russia invasion of Ukraine, the International Tennis Federation suspended Russia and Belarus from Billie Jean King Cup competitions. Format Tournament While many nations enter the BJK Cup each year, only 16 countries qualify for the elite World Group and World Group II each year (eight in World Group and eight in World Group II). They reach World Group and World Group II as follows: (a) World Group – the four nations that win their World Group first round tie remain in the World Group for the following year. First round losers contest the World Group Play-offs against the four winning nations from World Group II to determine relegation/promotion for the following year's competition. (The four nations that win World Group Play-offs will be in the World Group the following year, while the four losers will start the following year in World Group II.) (b) World Group II –