Yes, for hunting upland game birds expandable broadheads are consider a lawful means of take. For your convenience on page 48 of the Upland Game, Furbearer & Turkey Seasons and Rules brochure there is a section outlining unlawful methods of take for upland game birds. I have copied and pasted this section here:

Unlawful Methods of Take

No person shall take upland game birds:

• From one-half hour after sunset to one-half hour before

sunrise. Upland game shall not be taken before 10 a.m.

on Fort Boise, C.J. Strike, Montour and Payette River

WMAs, during the pheasant season. Turkeys shall not be

taken from sunset to one-half hour before sunrise.

• With a trap, snare, net, crossbow, slingshot, hand-held or

thrown missiles, firearms except a shotgun using shells

not exceeding 3 ½ inches maximum length, except forest

grouse. Forest grouse shall not be taken with a trap, snare,

net or crossbow.

• From boats or other craft having a motor attached unless

the motor is completely shut off and forward progress has

ceased, or the boat is drifting naturally, or it is propelled

only by paddle, oars, or pole, or it is beached, moored or

resting at anchor. (2010-2011 Season)

• From any watercraft. (Effective 2011-2012 Season)

• By the use or aid of any electronic call.

• By the aid of baiting. Bait is defined as any substance

placed to attract game.