What is legal when duplexing a repeater?

[WRYF747]

What is allowed and not allowed with duplexing? Can I reverse normal GMRS duplexing (467 as input, 462 as output) like an LMR repeater?

[SteveShannon]

50 minutes ago, WRYF747 said:

What is allowed and not allowed with duplexing? Can I reverse normal GMRS duplexing (467 as input, 462 as output) like an LMR repeater?

Not on the repeater:

462 MHz main channels. Only mobile, hand-held portable, repeater, base and fixed stations may transmit on these 8 channels. The channel center frequencies are: 462.5500, 462.5750, 462.6000, 462.6250, 462.6500, 462.6750, 462.7000, and 462.7250 MHz. 

467 MHz main channels. Only mobile, hand-held portable, control and fixed stations may transmit on these 8 channels. Mobile, hand-held portable and control stations may transmit on these channels only when communicating through a repeater station or making brief test transmissions in accordance with § 95.319(c). The channel center frequencies are: 467.5500, 467.5750, 467.6000, 467.6250, 467.6500, 467.6750, 467.7000, and 467.7250 MHz.

[WRYF747]

What are control and fixed stations?

[SteveShannon]

5 minutes ago, WRYF747 said:

What are control and fixed stations?

Control station. A station at a fixed location that communicates with mobile stations and other control stations through repeater stations, and may also be used to control the operation of repeater stations. 

Fixed station. A station at a fixed location that directly communicates with other fixed stations only.

[marcspaz]

Not only is it not allowed (as normal practice), the only way to use the repeater in that configuration would be to use non-type approved hardware or otherwise type approved hardware with a configuration that invalidates its certification and legal use.  So, it would be a double no.