What, to be eligible for retirement benefits? Same rules as any other job.
But, also like any other job, if you quit prior to retirement nothing happens to you financially speaking other than you’re not eligible for those retirement benefits.
And for me personally- after a couple years of making that $100k/mo and amassing a solid portfolio of assets and properties, missing out on my job’s retirement benefits for quitting before retirement age just wouldn’t really bother me all that much. Personally speaking.