dhcp.conf : not authoritative

[lamsf]

Hi,
I hv the following configuration in the dhcpd.conf file.

shared-network inside{
subnet 172.16.10.0 netmask 255.255.255.128 {
not authoritative;
}
subnet 172.16.10.128 netmask 255.255.255.128 {
range 172.16.10.240 172.16.10.254;
option routers 172.16.10.129;
}
}

I do not understand the "not authoritative" statement above. I hv looked up the man pages but still do not understand why it is there.

Can someone pls help to explain in a simpler manner what the "not authoritative" as above is for?

Thanks alot.