In a public statement dated March 7, 1941, the Commission announced its determination that transmission lines which are not primary lines transmitting power from the power house or appurtenant works of a project to the point of junction with the distribution system or with the interconnected primary transmission system as set forth in section 3(11) of the Act are not within the licensing authority of the Commission, and directed that future applications filed with it for such licenses be referred for appropriate action to the Federal department having supervision over the lands or waterways involved.