There is some info:
Any health carrier shall provide to any prospective enrollee written information describing the terms and conditions of the plan. If the plan is described orally, easily understood, truthful, objective terms shall be used. The written information need not be provided to any prospective enrollee who makes inquiries of a general nature directly to a carrier.
http://law.justia.com/southdakota/codes/58/58-17c-5.html copy
Page Title: Table 5: Percentage of Facilities Reporting That They Provide Key Written Information to Prospective Residents.
http://www.tpub.com/content/cg1999/he99027/he990270017.htm copy