Phase-1 proposals and Phase-2 programs are submitted to the ALMA archive in Chile, with each submission resulting in an email acknowledgement being sent to the PI and all other investigators. For non-DDT proposals, multiple submissions before the deadline are possible. Once submitted, projects can be retrieved from the archive using a search interface. Note that each submission causes a timestamp to be written into a project and if this is older than the one attached to the archive copy, a warning will be issued. Because of this, it is often easier to just work with the version of the proposal stored in the archive, although it is not currently possible to share this with co-Is.
Projects from previous cycles can be used to create new proposals. For example, if an old project has been stored on disk, it can be read into the OT and submitted as a new proposal (using the usual 'Submit Project' option in the File menu) so long as it is in the Phase-1 state i.e. the Proposal tab of the Project Structure pane is active. The Project Cycle shown in the Proposal editor will initially show the original value, but this will be updated during submission, as will the previous proposal code if this had originally been set. When the project is submitted, the OT will bring up a pop-up warning that a new proposal is being created, in case this is not what was intended.
No proposals from previous cycles that are stored in the archive should be in the Phase-1 state. Many will have been rejected or be in a Phase-2 state, in which case SBs will almost certainly have been created. In either case, these cannot be simply retrieved from the archive and submitted as a new proposal - instead the 'Open Project as New Proposal' option from the File menu should be used instead. This will convert the Phase-2 project into Phase 1 and remove any referenes to the previous cycle i.e. no project code will be set and the Proposal Cycle will be set to the current value.