If I already have a CHRC that I obtained for another purpose, can I use that report instead of going through the CHRC process again?

No.  An additional CHRC would need to be completed as required by the Board of Nursing.    Fingerprints submitted to other agencies cannot be used by the Board of Nursing to obtain criminal history record checks from the BCI and the FBI.  According to the CFR, Section 50.12…“records obtained from the FBI may be used solely for the purpose requested and may not be disseminated outside the receiving department, related agency or other authorized entity”.