Meetings concentrating on law and the land are scheduled here Sunday through Tuesday by the American Land Development Association at the Mayflower. For information, call 659-4582.

Ground-breaking ceremonies for Whiting's Neck Estates and Equestrian Center are being held today at the site in West Virginia, north of Shepherdstown near the west bank of the Potomac River.

C.J. Cross & Associates, Inc., recently arranged refinancing of $6.6 million on the 10-year-old, 727-unit Cherry Hill garden apartment complex in the Landover area near Cooper Lane and Annapolis Road in prince George's County. Cherry Hill Associats, with William Cafritz as managing partner, plans to upgrade the property.

Author Morris Milgram, HUD assistant secretary for fair housing Chester C. McGuire and HUD deputy counsel Edward Norton will be the speakers Tuesday noon when the National Housing Conference holds a luncheon meeting at the International Inn.

The National Association of Home Manufacturers will sponsor a session on energy conservation standards for new home construction at 2 p.m. Tuesday at the National Housing Center. For information, call 234-1374.

Kenneth G.Hance Jr., newly named president of the National Realty Committee based in New York, said that the non-profit business league of real estate owners and developers will open an office in Washington later this year.

The written licensing examinations for brokers and sales persons in the District will be given at 8:30 a.m. May 24 at the Quality Inn at 415 New Jersey Ave. NW.