The regional district board deferred Tuesday a Jim Gillis motion concerning the Canadian Aeronautics Act to a future committee of the whole meeting. The Area B director would like to see the act implement airport zoning to more accurately reflect modern navigation systems. Gillis, who notes zoning has affected the placement of the proposed regional hospital, motioned at the last committee session to request the Union of B.C. Municipalities, with Transport Canada, to review the act. The Vancouver Island Health Authority had proposed to construct the hospital on Ryan Road near Crown Isle. However, the Department of National Defence said it fell within an area around CFB Comox and the airport that restricts the height of structures to fewer than nine metres. Gillis is also concerned about eagle and blue heron nesting trees in the vicinity of the airport. Following Tuesday's meeting, the board met in-camera with members of the Comox Valley Airport Commission and CFB Comox 19 Wing to discuss height restrictions, tree removal and aeronautics matters.The base is selectively topping and cutting certain trees in Kye Bay, under the direction of certified arborists, that are protruding into restricted commercial space. However, trimming within the buffer zone of the heron colony is on hold until mid- to late-September during nesting season."The goal is to minimize impact to the environment," said Trevor Reid, public affairs officer at 19 Wing. "We're not saying all the trees have to come down."reporter@comoxvalleyrecord.com