RFC 792 does not mention about the Address Mask( or type 17/18). However RFC 950 has the inherent rationale(Section 2.3) for embedding this option in icmp.
Using nemesis the solution can be seen in action outright.
@SOURCE_MACHINE>/usr/local/bin/nemesis icmp -qM -i 17 -m 0 -S 126.96.36.199 -D 188.8.131.52 -H 0:3:ba:4e:40:44 -M 00:03:ba:5b:8f:5d
ICMP Packet Injected
Using device /dev/eri (promiscuous mode)
SOURCE_MACHINE -> DESTINATION_MACHINE ICMP Address mask request
DESTINATION_MACHINE -> SOURCE_MACHINE ICMP Address mask reply (Mask = 0xffffff00)