In England, Wales and Ireland the Course Handicap is rounded up before then calculating the Greensome Handicap
In Scotland they use the full Course Handicap calculated figure.
If you have mixed/multi-tee pairings, remember that to achieve equity any CR/Par adjustment is half the combined adjustments for each side and the committee must specify in the Terms of Competition which single set of tees will determine the Pars and SI that are to be used.
Hope this helps
Tony