Age limit on partner visas for Australia?

Hi everyone. I am an Australia Citizen living in Melbourne and am 51 years old. My partner is 50 and is Dutch. We have known each other a long time but have been together for about a year. Mainly with each of us going back and forth for short visits. We may want to get a partner visa next year. Is there an age limit for partner visas? Also any tips for getting one would be appreciated. Thank you!