  In this paper we analyze the relativistic corrections to the leading order
three-nucleon (3N) contact interactions. These boost corrections are derived
first from the nonrelativistic reduction of covariant Lagrangians and later
from the Poincar\'e algebra constraints on nonrelativistic theories. We show
that in order to describe the 3N potential in reference frames other than the
center-of-mass frame, the inclusion of five additional terms with fixed
coefficients is required. These terms will be relevant in systems with mass
number A>3. How they will affect EFT calculations of binding energies and
scattering observables in these systems should be investigated.
