Agreed - as specified in the standard player contract Richards signed.
Actually, it would depend on what it said (if such a clause was in there). If for example it said he had to report such things in 48-72 hours then it would obviously help LA. If it said he had 2 weeks or until his next team check-in (or whatever) then it would help Richards.
As for players reporting injuries to the team, I would bet that there's something in there somewhere that says players have to inform the team about injuries, or talk to their doctors or something. Not everything (such as a bruised pinky) but I'd bet there's something in there for things like surgery or if something is broken/torn, or something of that nature.
I just can't imagine that an SPC wouldn't have something in there with regards to injuries in the offseason and not informing the team somehow.
Edit. Okay, took a quick look at the SPC and there is a couple of interesting things in there. As for injuries there's actually a ton in there. I didn't see a timeline, but it does state that a player must have the team doc have a look at him (or another doc of the team's choosing). AKA he needs to inform the team if he's injured.
- 2b states that a player must "keep himself in good physical condition at all times during the season".
- 2c to conduct himself on and off the rink according to the highest standards of honesty, morality, fair play and sportsmanship, and to refrain from conduct detrimental to the best interest of the Club, the League or professional hockey generally.
- 3 In order that the Player shall be fit and in proper condition for the performance of his duties as required by this SPC and the Agreement,
<snip>
- 5a Should the Player be disabled or unable to perform his duties under this SPC he shall submit himself for medical examination and treatment by a physician selected by the Club, and such examination and treatment
<snip>
Some more reading. Termination/Material breach.
14. The Club may also terminate this SPC upon written notice to the Player (but only after obtaining Waivers from all other Clubs) if the Player shall at any time:
(a) fail, refuse, or neglect to obey the Club's rules governing training and conduct of Players, if such failure, refusal or neglect should constitute a material breach of this SPC.
(b) fail, refuse or neglect to render his services hereunder or in any other manner materially breach this SPC.
NHL CBA. Player SPC is listed on page 310.
http://www.nhl.com/nhl/en/v3/ext/CBA2012/NHL_NHLPA_2013_CBA.pdf