So let’s keep this simple. This governs work that I have taken from 2018 to 2020.
The headshot photos and portrait photos that I take are for your personal and professional use. That means you can share them on social media, use it on promotional materials for yourself, your company bio, and articles that you have written. This license does not have an expiration date. But there are some exceptions.
For use in publications, I should be credited with having taken the photo. The only acception to this is for very small bio headshots, where copyright notice/credits are not standardly given.
Use subject to additional licensing fees and royalties: Special permission and applicable fees come into play for what the standard is in the industry. This includes use in national or regional advertising campaigns, journalistic works, book artwork, album artwork, etc.