I think you are referring to a referral.  Initiative and referendum powers are reserved to the people and not the legislature via Oregon Constitution (sec 1(3), Article IV, and sec 10, Article VI).  An interesting turn of events might be a county-wide referendum (initiated by elector petition) to overturn any ordinance adopted by the Board that tinkers with the initiative process.  The Board would hard pressed to conclude such a petition would not of "county concern".   Ah ... democracy.