The PTCB requires that pharmacy technicians obtain 20 hours of continuing education credit every 2 years. Which of the following also applies? 1) Pharmacy technicians must pass a certification exam every 2 years. 2) Pharmacy technicians must complete a certain number of practice hours every 2 years. 3) Pharmacy technicians must attend a conference every 2 years. 4) Pharmacy technicians must renew their license every 2 years.