HONG Kong Stadium managers Wembley International have demanded free Sevens tickets for patrons of their 50 executive suites. While local fans will fork out $350 each and form an overnight queue at Victoria Park on January 30 when tickets go on sale, Wembley have insisted that the 1,500 tickets allotted to them be given free of charge. A November 19 draft of a contract between Wembley and Sevens organisers the Hong Kong Rugby Football Union - a copy of which has been obtained by Sports Post - contains a clause which obliges the organisers to furnish the tickets. The union, who have been involved in a heated dispute with Wembley over the use of boxes and subsidiary money-making aspects of the tournament, have yet to sign any contract with the stadium managers, according to union secretary Peter Else. The clause in the draft document states: ''The Hirer hereby agrees to provide to the Manager with (sic) 1,500 Event Tickets free of charge for use by the Executive Suite owners [''Executive Suite Tickets''] and such tickets shall be made available to the Manager at least 2 days before the public sale of the Event Tickets.'' The document - drawn up by Wembley's solicitors - also states that the design of tickets and temporary box tickets is subject to Wembley's approval and that the tickets should bear the logo of the stadium on the back. The issue could cause some problems. It is not guaranteed that companies who take out suites on a long-term basis are regular supporters of the Hong Kong Sevens, scheduled for March 26 and 27 next year. This means there is the possibility of empty seats at the club level of the 40,000-seater stadium, where the suites are situated. There is also the prospect of tickets getting into the hands of touts. The union came in for heavy criticism in 1990 and 1991 because thousands of tickets entered the black market. They have since come up with a successful formula for the last two years. But with suite owners not necessarily Sevens fans, there is the possibility that no-cost tickets could change hands at black market prices. In 1990 and 1991, tickets were touted for as much as $1,000. Wembley's demand for the tickets could also set a precedent for organisers of future sporting events. With Sevens organisers unable to win access to the suites, Wembley will build temporary boxes for the union's patrons and take a fee of $15,000 for each box or 20 per cent of the sale price of each box. The draft contract also states that all advertising hoardings within permitted areas of the stadium will be for the organisers' use, but that Wembley should receive 25 per cent of all sales. In addition, Wembley want 25 per cent of any advertising sold on the diamond vision screen and scoreboard during the event. The managers would also receive from the organisers 20 per cent of the revenue from tournament programme sales, according to the draft. It also says Wembley will take charge of catering services and stewarding - a move which would mean the union losing the percentage they normally earn from beer vendors. It is also understood that the managers will decide what beers are to be served during the two days of rugby. It is believed that only three brands will be on sale. The Sevens generates a gross revenue estimated at $22 million, about $7 million coming from the hiring of corporate boxes. Next year, the union could lose close to $1.5 million in temporary box fees to Wembley. The net profit from the Sevens is approximately $5 million, but that is unlikely to repeated next year. at a time when Hong Kong will need the finances as they attempt to qualify for the 1995 World Cup in South Africa.