During this period, Caremark's Board took several additional steps consistent with an effort to
assure compliance with company policies concerning the ARPL and the contractual forms in the
Guide. In April 1992, Caremark published a fourth revised version of its Guide apparently designed
to assure that its agreements either complied with the ARPL and regulations or excluded Medicare
and Medicaid patients altogether. In addition, in September 1992, Caremark instituted a policy
requiring its regional officers, Zone Presidents, to approve each contractual relationship entered into
by Caremark with a physician