get $thing1,$rel,$thing2 in $loc;

if $rel eq 'to' then check else cannot;

##check:
if $pw like $target's pw then chg else itslocked;

##chg:
set $thing1 to $thing2;
say 'change',"[$actor] changed $cmd_text.";look $loc;

##itslocked:
say 'cannot',"[$actor] could not change $cmd_text because it is locked.";

##cannot:
say 'cannot',"[$actor] could not change $cmd_text.";