The place of supply of services to a non-taxable person shall be the place where the supplier has established his business. However, if those services are provided from a fixed establishment of the supplier located in a place other than the place where he has established his business, the place of supply of those services shall be the place where that fixed establishment is located. In the absence of such place of establishment or fixed establishment, the place of supply of services shall be the place where the supplier has his permanent address or usually resides.