Use egg flies or roe flies. Everyday might still sell them?
Here's how they define artificial fly:
artificial fly … a single-pointed hook that is
dressed only with fur, feathers, hair, textiles,
tinsel and/or wire, and to which no external
weight or external attracting device is
attached. Two or more hooks tied in tandem
is not permitted. Where gear is restricted
to artificial flies, floats and sinkers may
be attached to the line. Where areas are
restricted to “fly fish only” floats and sinkers
may not be attached to the line or fly.
Here's how fly fishing is defined:
fly fishing … angling with a line to which only
an artificial fly is attached (floats, sinkers,
or attracting devices may not be attached
to the line when fishing is restricted to "fly
fishing only”).