Amateur radio operators use frequency bands as assigned by each individual country. Many parts of the bands are common to all so that global communications can take place between operators in different countries.
The bands fall into ranges of frequencies that have specific names such as mid frequencies (MF) in the range of kilohertz (kHz), but below 3 megahertz (MHz), high frequencies (HF) in the range of 3 to 30 MHz, very-high frequencies (VHF) in the range of 30 to 300 MHz, ultra-high frequencies (UHF) in the range of 300 MHz to 3 gigahertz (GHz), super-high frequencies (SHF) in the range of 3 to 30 GHz, extra-high frequencies (EHF) in the range of 30 to 300 GHz. There are even higher frequencies dedicated to hams, including light frequencies.
These band constitute an enormous treasure given to hams for which we do not have to pay. The fundamental limitation of the use of this treasure is that no business can be conducted over these bands. Commercial stations must pay for the use of other frequenices.
The ham radio community is very serious about any misuse of the bands, and will help Canadian officials capture any offenders.