Fees received for services performed as a notary public are reported on Schedule C
but are not subject to self-employment tax as such payments are specifically excluded.
"Director's fee" are subject of self-employment taxes in most situations - they are paid for services actually rendered (the directors actually attended the meetings) - and as such are subject of SE tax.
Your activities (services) may be classified as business or as hobby.
If you have no intention to make any profit and you believe that is your hobby - your occasional income would not be subject of self-employment taxes.
That would be true unless the Tax Court rules
Generally - the IRS
presumes that an activity is carried on for profit if it makes a profit during at least three of the last five tax years
, including the current year.
So - if you regularly make profit - there is a risk the IRS disagree with your treatment of your activity as a hobby - and you might be expected to defend your position in the Court.
Sorry if you expected differently.