Said you obeyed the rules (8)
I believe the answer is:
observed
'said' is the definition.
(observing is a kind of saying)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for observed that I've seen before include "with witnesses" , "Noticed or remarked" , "Ascertained by sight" , "Seen" , "saw" .)