  We exploit the theoretical strength of the supervariable and
Becchi-Rouet-Stora-Tyutin (BRST) formalisms to derive the proper (i.e.
off-shell nilpotent and absolutely anticommuting) (anti-)BRST symmetry
transformations for the reparameterization invariant model of a
non-relativistic (NR) free particle whose space $(x)$ and time $(t)$ variables
are function of an evolution parameter $(\tau)$. The infinitesimal
reparameterization (i.e. 1D diffeomorphism) symmetry transformation of our
theory is defined w.r.t. this evolution parameter $(\tau)$. We apply the
modified Bonora-Tonin (BT) supervariable approach (MBTSA) as well as the
(anti-)chiral supervariable approach (ACSA) to BRST formalism to discuss
various aspects of our present system. For this purpose, our 1D ordinary theory
(parameterized by $\tau$) is generalized onto a $(1, 2)$-dimensional
supermanifold which is characterized by the superspace coordinates $Z^M =
(\tau, \theta, \bar\theta)$ where a pair of Grassmannian variables satisfy the
fermionic relationships: $\theta^2 = {\bar\theta}^2 = 0, \, \theta\,\bar\theta
+ \bar\theta\,\theta = 0$ and $\tau$ is the bosonic evolution parameter. In the
context of ACSA, we take into account only the (1, 1)-dimensional (anti-)chiral
super sub-manifolds of the general (1, 2)-dimensional supermanifold. The
derivation of the universal Curci-Ferrari (CF)-type restriction, from various
underlying theoretical methods, is a novel observation in our present endeavor.
Furthermore, we note that the form of the gauge-fixing and Faddeev-Popov ghost
terms for our NR and non-SUSY system is exactly same as that of the
reparameterization invariant SUSY (i.e. spinning) and non-SUSY (i.e. scalar)
relativistic particles. This is a novel observation, too.
