Using this Law in my paper ( https://www.academia.edu/31457696/A_Mathematical_Theory_of_Success ), I made a statement (in II.6 of my paper, in the 1st paragraph, second line) that, "If no force is applied to the particle at any instant of time, the particle will remain in the same state of motion as the previous instant of time".

This statement is based on Instantaneous Force and from this statement Newton's first law can be concluded. So, this statement can be considered as Modified Newton's First Law of Motion or Instantaneous Law of Inertia.