COBHA with its 440 hours of live classes is a pioneer in creating high standards for American Essential Oil therapists. Our school’s regulations and 501C 3 non-profit status were developed by an enthusiastic group of aromatic devotees as the first Board of Directors. Cobha became state certified by the California Bureau of Private Post Secondary for Vocational Education in 2003. As of January 1, 2010, the Bureau is operated under the Council of Consumer Affairs in Sacramento, California.