First held in 1973 , it is the top division of the Scottish League Championship .
The Scottish Premiership ( referred to as the BT Premiership for sponsorship reasons ) is an amateur league competition for Scottish rugby union clubs .
First held in 1973 , Scottish Premiership is the top Scottish Premiership of the Scottish League Championship .
The Scottish Premiership ( referred to as the BT Premiership for sponsorship reasons ) is an amateur league competition for Scottish rugby union clubs .