Move one from parent squad - is this allowed to be outside deployment zone?

"• During the “Deploy Units” step of Setup, a unit with the detachment keyword must be placed at speed-1 and within height 1 of a unit leader from a friendly unit that has the unit name or type specified by the detachment keyword.
» When deploying multiple units with the same detachment keyword, each unit must be deployed at speed-1 and within height 1 of a different friendly unit leader. Once a unit has been used to fulfill the deployment requirements of a friendly unit with the detachment keyword, it cannot do so again for another friendly unit with the same detachment keyword.
» When a unit deploys using the detachment keyword, it does not have to be deployed within its deployment zone.
» If a unit with the detachment keyword cannot be deployed following the detachment rules it is deployed as normal in a player’s deployment zone. However, if a player has a unit with the name or type specified by thedetachment keyword that has not yet been deployed, that unit must be deployed before a unit with the detachment keyword is deployed, such that the unit with the detachment keyword is able to be deployed following the detachment rules.
» This restriction is only required during the “Deploy Units” step. If a game effect (such as the Rapid Reinforcements battle card) allows a unit to be placed outside of this step, it does not follow the detachment keyword rules."

Rules Reference, p. 35