rules are rules
uncancellable
undeterrable
unscrewable
inalterable
nonrepudiation
unthrowable
undefiable
unskippable
noncircumventable
unforgoable
quenchless
valid
unleavenable
rulable
unmessupable
agreement in principle
black-letter law
unforestallable
fair game
uninfringeable
unnegatable
inconfinable
unconfinable
undraggable
by the book
unignorable
legitimate
unrefusable
irrefusable
every law has its loophole
unvanquishable
legal
unavertable
untrickable
allowable
undissuadable
unpunchable
checkless
untweakable
permissible
standing order
unhijackable
unturnoffable
ceremonious
conventional
nonvoidable
unrescindable
unvoidable
undownable