AGX MODULE_POWER_ON voltage rating

For AGX Xavier module, what is the voltage rating on the MODULE_POWER_ON pin (L54). Is there any sequencing requirement with respect to other rails?
P2822 shows the pin driven push-pull from the always-on 3v3 rail; the OEM guide shows a pullup to 5v. Can I drive it push-pull from 5v (vin_mv) at any time?

As said in DG, it is 5.0V Open-Drain (Non-MCU case). CMOS – 3.3V (Power Button MCU case). No critical timing on it, when it is asserted, the module power rails will be enabled.