The Resident Return Visa (RRV) Subclass 155 is for current or former Australian permanent residents and former Australian citizens who want to travel in and out of Australia while maintaining their permanent resident status.
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Resident Return Visa Subclass 155 | RRV Eligibility, Renewal, Processing Time
Resident Return Visa (RRV) Australia allows permanent residents to maintain their status. Subclass 155 renewal requires eligibility proof, with varying processing times based on application.
https://asiapacificgroup.com/blog/resident-return-visa-rrv-subclass-155/