human: Which additional measures will be available during the Sunrise Period?
assistant: Three transitional measures will already be available during the Sunrise Period, in some cases ((1) and (2)) as soon as Germany deposits its instrument of ratification:

The applicant of a European patent application may file a request to delay the grant of a European patent in order to still be able to obtain a Unitary Patent later. The request can be validly filed:
If the Communication under Rule 71(3) EPC has been issued by the EPO; and  If the applicant has not yet approved the text proposed for grant.
The applicant of a European patent application having received the Communication under Rule 71(3) EPC may file an early request for a unitary effect so that a Unitary Patent will be registered immediately on the entry into force of the UPCA. The request can be validly filed:
If the Communication under Rule 71(3) EPC has been issued by the EPO; and  If the applicant has not yet approved the text proposed for grant.
The owner of any previously granted classical European patents may register an opt-out (more details below). Such opt-out will have the effect that the UPC is no longer responsible for infringement and invalidity actions regarding these patents. Instead, the relevant national courts will be responsible. The opt-out request needs to be filed with the UPC registry in Luxembourg and may already be filed during the Sunrise Period with the advantage that it is effective immediately at the start of the UPC.