Which statement is true regarding the use of shock-belts and leg irons on prisoners during flight?

The statement that shock-belts and leg irons are allowed only for violent offenders is accurate within the context of prison transport regulations and airline security policies. These restraints are used primarily to ensure the safety of both the prisoners and the airline's passengers and crew. Violent offenders pose a higher risk of harm or disruption compared to non-violent offenders, which justifies the selective use of such restraints.

In many jurisdictions, regulations require law enforcement or prison authorities to assess each inmate's risk factors before deciding on the use of physical restraints during transport. By allowing only violent offenders to be restrained with devices like shock-belts and leg irons, the policy balances the need for security with considerations of respect and human rights for prisoners who are deemed non-violent.

Other responses might suggest more permissive or restrictive uses of such restraints, which do not align with established practices that prioritize both safety and the dignity of individuals in custody.