  Removing the field redefinitions, the Bianchi identities and the total
derivative freedoms from the general form of the gauge invariant couplings at
order $\ell_p^6$ for the bosonic fields of M-theory, we have found that the
minimum number of independent couplings in the structures with even number of
the three-form, is 1062. We find that, except two couplings which have the
Ricci scalar, there are schemes in which there is no coupling involving
$R,\,R_{\mu\nu},\,\nabla_\mu F^{\mu\alpha\beta\gamma}$. In these schemes, there
are sub-schemes in which, except one coupling which has the second derivative
of $F^{(4)}$, the couplings can have no term with more than two derivatives. We
find some of the parameters by dimensionally reducing the couplings on a circle
and comparing them with the known couplings of the one-loop effective action of
type IIA superstring theory. In particular, we find the coupling which has term
with more than two derivatives is zero.
