Can be important for credentialing. Need to have done that procedure within some timeframe for them to allow you to do it. At least logging a few throughout each year might be enough, but obviously documenting all is ideal.
Individual hospitals MAY have certain minimums beyond the ACGME minimum required for credentialing. Particularly procedural sedations (this one seems to have the most hospital-to-hospital variation and very close scrutiny). With sedations you may want to note, which agents in particular you are using (eg: propofol) as credentialing may be specific to the given agent.