Marvin Levy, a DreamWorks marketing exec, will chair the 70th Annual Academy Awards public relations coordinating committee for the fifth consecutive year. Levy is an Academy governor representing the public relations branch. The PR committee coordinates efforts of the Academy, ABC, the Oscarcast production team and the various vendors and service providers to create a unified publicity and promotion campaign. Academy Awards nominations will be announced at 5:30 a.m. on Tuesday, Feb. 10, 1998, at the Academy headquarters in Beverly Hills. The awards ceremony will be broadcast live from the Los Angeles Shrine Auditorium by ABC-TV at 6 p.m., PST, Monday, March 23.