You can use the FormatConditions.Add Method in place of your pseudo code. With "Form3" open in Design View, I did the following in the Immediate window:
Forms("Form3").Controls("txtNote").FormatConditions.Add acFieldValue, acBetween, 10, 100
Forms("Form3").Controls("txtNote").FormatConditions(0).ForeColor = vbRed
' confirm the FormatCondition is enabled ...
? Forms("Form3").Controls("txtNote").FormatConditions(0).Enabled
True
Then inspecting the format condition from the form property gave me this ...
For 24 controls, you could create a procedure to apply the conditional formats. Modify the procedure when the rules change. Or store the rules in a table and have the procedure read the rules from the table.