ntpd configuration file changes

[jekillen]

Hello:
Q: When making changes to ntp.conf it is necessary to restart the 
server?
(I suspect yes)
Q: How is that done?
(I suspect ntpd reload or restart per rc script.. along the lines of 
apachectl restart
or postfix reload??? Kill -HUP pid ??? )
I am looking at FreeBSD handbook and ntp documentation and have not
found the answers.
thank you in advance for info
Jeff K