"You need a pen licence because that's what you use at work".
Um no. Secretaries, lawyers and journalists used typewriters and engineers used propelling pencils. Builders had these odd rectangular shaped pencils that could write on anything. Fitters and boilermakers used chalk.
Only schoolchildren used biros.
As far as I can find out, there is no constitutional restriction on outsourcing the imprisonment of Americans in foreign countries. This is not deportation.
Australia was founded on the outsourcing of imprisonment of British prisoners, after the US war of Independence when US states refused to continue to take British prisoners.
Garcia was determined to be a refugee because he was a member of an El Salvadorian gang, so there is no likelihood he will be released in El Salvador.