Ipv6 firewall question

Installing and Using OpenWrt
1

could i combine these two rules by adding 'iso' in the option src of the first rule? so it would read option src 'wan iso'

config rule
        option name 'Allow-ICMPv6-Input'
        option src 'wan'
        option proto 'icmp'
        list icmp_type 'echo-request'
        list icmp_type 'echo-reply'
        list icmp_type 'destination-unreachable'
        list icmp_type 'packet-too-big'
        list icmp_type 'time-exceeded'
        list icmp_type 'bad-header'
        list icmp_type 'unknown-header-type'
        list icmp_type 'router-solicitation'
        list icmp_type 'neighbour-solicitation'
        list icmp_type 'router-advertisement'
        list icmp_type 'neighbour-advertisement'
        option limit '1000/sec'
        option family 'ipv6'
        option target 'ACCEPT'

config rule
         option family 'ipv6'
         list proto 'icmp'
         option src 'iso'
         option target 'ACCEPT'
         option name 'IPv6 allow specific ICMP'
         list icmp_type 'bad-header'
         list icmp_type 'destination-unreachable'
         list icmp_type 'echo-reply'
         list icmp_type 'echo-request'
         list icmp_type 'neighbour-advertisement'
         list icmp_type 'neighbour-solicitation'
         list icmp_type 'packet-too-big'
         list icmp_type 'parameter-problem'
         list icmp_type 'router-advertisement'
         list icmp_type 'router-solicitation'
         list icmp_type 'time-exceeded'
         list icmp_type 'unknown-header-type'
2

Do you have any networks that you don't want the router to accept icmpv6 from? If not, just change option src in the first rule from wan to * and get rid of the second rule.