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) What we show in the paper is how a ( natural ) set of axiomatic restrictions imposed on the set of policy announcements may yield an unambiguous stationary state towards which all policy announcements will converge . Indeed , the facts show that the MPTN and its individual Indian members do receive significant benefits from the Tribe 's extension of pharmacy services to the tribe 's non-Indian employees . In this particular situation , the teacher might be able to show that the student had actually made up the missed work or its equivalent even though not when classes were finished for the day . The Commission shall set a maximum measurable level for a contaminant or substance of concern only when there is sufficient scientific evidence to show that the contaminant or substance of concern may cause adverse effects to public health or the environment . Both of these organisations are independent of each other but show in the spirit of Internet that cooperation can be achieved .