We have the ability of to 'delegate' our scope to a lower level registered EMS provider. For example, a AEMT could delegate a EMTB to start an IV or insert a King LT, etc. Or a Paramedic could delegate a AEMT to administer narcotics or insert a chest tube, etc. This is under the complete discretion of the higher scope EMS provider and must be under DIRECT supervision and guidance. You can only delegate to a person one level lower than you. For example a Paramedic could delegate to a AEMT but not to a EMTB.
Some will do it some will not. It depends on your working relationship with your partner and if you prove you can perform and know your stuff. Afterall, it will also be their license on the line if you screw it up.