Accidental glyph must clear the previous chord's rightmost extent

An accidental must not collide with the notehead(s), ledger lines, or dot glyphs of the immediately preceding chord/note.

A rapid eighth-note run crowds an accidental against a preceding dotted note's dot because spacing under-allocates room.

Ross, standard note-spacing discussion covering accidental-vs-previous-note clearance.

This rule is about where marks land on the page, so it can only be judged after engraving. Collision and spacing faults live here.