For instance , the Instrument of Government is SFS 1974 : 152 , with each amendment having its own SFS number .
The number contained in the citation consists of a four digit year , a colon and then an incrementing number by year .
The Instrument of Government is SFS 1974 : 152 , with each amendment having its own SFS number .
The number contained in the citation consists of a four digit year , a colon and then an incrementing number by year .