This is a MURS and common business frequency. Anyone can use it without a license as long as they follow the MURS rules. Same goes with 151.8200 MHz, 151.8800 MHz, 151.9400 MHz, and 154.5700 MHz. 151.6250 MHz, 151.9550 MHz, and 154.5400 MHz are also common business frequencies, but to use them you must have a license for them. I've also seen 154.5150 MHz listed as a common business frequency, but have never heard anything on it.