Short answer: To appeal a decision SFL makes under the Code of Conduct, email thereadyroom@strikefighterleague.com within 7 days after SFL tells you. For rule feedback, the Charter describes a Rules and SPINS Feedback System.
Appeals. SFL tells you the breach it found and the sanction. You may appeal within 7 days, by email to thereadyroom@strikefighterleague.com; say which decision you are appealing and why. An SFL official, or the appeal body the Charter names, who was not involved in the original decision decides it. That decision is final within SFL.
Rule feedback.Gripes report a rule ambiguity or a scoring or outcome impact. SPINS changes recommend a change to an event's SPINS. Proposals suggest new rules, Charter changes or events. The Standing Rules Committee (SRC) triages them. The published pages give no link for submitting them.
Disciplinary rulings. The Competition Disciplinary Panel rules on violations, and appeals of its rulings go to the SRC.
To ask a rules question, open a ticket in #sfl-support on the SFL Discord (see Who do I talk to?).