During review of the proposal to resolve issue TOSCA-3 a discussion about policy languages came up. See the following meeting notices:
http://www.oasis-open.org/apps/org/workgroup/tosca/download.php/45574

Some TC members felt that a strong tie to WS-Policy is not appropriate. There are other approaches to define policies that are relevant for particular domains. Thus, this sub-task should review such other approaches and propose how to define policies in TOSCA. Alternatives might be to support multiple approaches, or (ii) to invent a new TOSCA policy language that abstracts the policy approaches considered to be relevant for TOSCA.