The following guidance for recording Leaf Mines in Britain is taken from the Micro-moth grading guidelines in the National Moth Recording Scheme
Category
A: Accept record without the need to see the actual leaf or a good
photo.
Category L: Either the leaf or a good photograph required.
Category R: Moth needs to be reared and, in some cases, possibly
dissected.
sponsored by Colin Plant Associates (UK) LLP/Consultant Entomologists