RES557 – 358 – resolves to invite the 2019 World Radiocommunication Conference to consider the results of the ITU-R studies and take necessary actions, as appropriate, invites ITU-R to conduct studies on, review, and identify possible revisions to, if necessary, the limitations mentioned in Annex 7 to Appendix 30 (Rev.WRC-15),while ensuring the protection of, and without imposing additional constraints on, assignments in the Plan and in the List and the future of BSS networks mentioned in recognizing c) and existing and planned FSS networks mentioned in recognizing d).