I don’t know if I fully understand your question, the gist of it is you can’t include simulated performance as actual results. If you started a fund 1 year ago you can’t show 5 years of history saying “well that’s what would have happened”. Simulated performance must be shown seperately from actual returns and must clearly be labelled as such.
I am not to sure what your asking specifically. Basically if you claim compliance with GIPS you cannot reference any simulated performance, regadless if you disclose or not disclose. There are no exceptions to this. GIPS is a performance presentation standard and as such is focused on giving the truest picture of comparability across companies of what has actually happened, not what could have or potentially may happen.