The Massachusetts Gaming Commission ruled on April 30 that Wynn Resorts may maintain its state casino license to open the $2.6-billion Encore Boston Harbor as scheduled on June 23. But Wynn Resorts must pay a record $35-million fine for not disclosing alleged sexual misconduct against Steven A. Wynn, the company’s founder and former chief executive and board chairman. The commission also fined Wynn Resorts CEO Matt Maddox $500,000. The 3-million-sq-ft resort on the Mystic River is the largest private single-phase construction project in the commonwealth’s history. It includes a privately funded $30-million effort to clean up the heavily contaminated site. The project also includes a five-star resort with 671 hotel rooms, retail, dining and meeting space on the 33-acre site.