It's not uncommon for players lacking experience to break a couple of the Laws of Chess. Specifically the ones likely to be broken are
6.2.3 A player must press his clock with the same hand with which he made his move. It is forbidden for a player to keep his finger on the clock or to ‘hover’ over it.
8.1.1 In the course of play each player is required to record his own moves and those of his opponent in the correct manner, move after move, as clearly and legibly as possible, in the algebraic notation (Appendix C), on the ‘scoresheet’ prescribed for the competition.
(League rules will sometimes/often permit the use of Descriptive)
8.4 If a player has less than five minutes left on his clock at some stage in a period and does not have additional time of 30 seconds or more added with each move, then for the remainder of the period he is not obliged to meet the requirements of Article 8.1.1.
In a tournament, you would, I suppose, be entitled to "summon the arbiter", but what of a league match with no arbiter present or at best the two match captains? What should the penalty be for persistent infringement? I don't think the Laws of Chess proscribe anything explicit, even where an arbiter is present.