Rotational emission spectra of HC1 and DC1 were observed with a Fourier transform spectrometer. A data set of 103 newlyobserved rotational lines, combined with the rotational and vibrational-rotational lines reported in the literature, was analyzed by fitting the data to a non-Born-Oppenheimer effective Hamiltonian expressed with the optimal parameters, i.e., the determinable clusters of expansion coefficients [H. Uehara, Bull. Chem. Soc. Jpn. 77 (2004) 2189]. Full internal consistency of the results of this analysis demonstrates the validity of the present universal scheme for determination of the physically significant parameters defined by the effective Hamiltonian. (C) 2005 Elsevier B.V. All rights reserved.