Read the bylaws.

Parking violation has to be based on the HOA regulation: CC&R and bylaws.  Does the regulation say what constitutes as Parking violation?  

Every thing you speak has to be based on the texts from the regulation.  It generally goes

The section xx.xx of the bylaw defines parking violation as ....

In the first alleged violation, I was doing ...., the section xx.xx does not apply because .....

In the second alleged violation, I was doing ...., the section xx.xx does not apply because ....