Try number 2

code/modules/mob/dead/new_player/new_player.dm

@@ -315,6 +315,8 @@
 			return "Your account is not old enough for [jobtitle]."
 		if(JOB_UNAVAILABLE_SLOTFULL)
 			return "[jobtitle] is already filled to capacity."
+		if(JOB_UNAVAILABLE_SPECIESLOCK)
+			return "Your species cannot play as a [jobtitle]."
 	return "Error: Unknown job availability."
 
 /mob/dead/new_player/proc/IsJobUnavailable(rank, latejoin = FALSE)
@@ -340,6 +342,8 @@
 		return JOB_UNAVAILABLE_PLAYTIME
 	if(latejoin && !job.special_check_latejoin(client))
 		return JOB_UNAVAILABLE_GENERIC
+	if(!client.prefs.pref_species.qualifies_for_rank(rank, client.prefs.features))
+		return JOB_UNAVAILABLE_SPECIESLOCK
 	return JOB_AVAILABLE
 
 /mob/dead/new_player/proc/AttemptLateSpawn(rank)