How to enable rules in hosts /etc/devfs.rules file

[Ernie Luzar]

I put some rules in the hosts /etc/devfs.rules file.
On reboot these new rules get enabled.
I would like to enable new rules without rebooting the system.

Read the devfs man page and issued some commands but got message saying 
unknown argument.

Say I have a rule number 10 that I added to the /etc/devfs.rules file.
How would I go about enabling it without a reboot?

Thanks