 This included members of the general public who only possessed a radio receiver and were not making transmissions, who were required to hold an "Amateur Experimental Station" licence, as well as pass the exam needed to receive an "Amateur Experimental Certificate of Proficiency", which required the ability to send and receive Morse code at five words a minute.In January 1922 the government lowered the barrier for individuals merely interested in receiving broadcasts, by introducing a new licence category, Private Receiving Station, that removed the need to qualify for an amateur radio licence.The receiving station licences initially cost $1 and had to be renewed yearly.