How does the AcceptEnv and PermitUserEnvironment directives in the sshd_config file work ?

Issue

• How does AcceptEnv and PermitUserEnvironment work?
• Can you please explain sshd_config - AcceptEnv vs PermitUserEnvironment directives?
• If I configure "PermitUserEnvironment no" in /etc/ssh/sshd_config, then users can no longer send environment variables AND any items being sent from the client with "SendEnv" will no longer be accepted, correct?"
• If this is the case, we can then remove the "AcceptEnv" directives in /etc/ssh/sshd_config as long as "PermitUserEnvironment no" is configured.