LLU is generally opposed by the ILECs, which in most cases are either former investor-owned (North America) or state-owned monopoly enterprises forced to open themselves to competition. ILECs argue that LLU amounts to a regulatory taking, that they are forced to provide competitors with essential business inputs, that LLU stifles infrastructure-based competition and technical innovation because new entrants prefer to 'parasitise' the incumbent's network instead of building their own and that the regulatory interference required to make LLU work (e.g., to set the LLU access price) is detrimental to the market.