Declension table of ?niyamapattra

Neuter	Singular	Dual	Plural
Nominative	niyamapattram	niyamapattre	niyamapattrāṇi
Vocative	niyamapattra	niyamapattre	niyamapattrāṇi
Accusative	niyamapattram	niyamapattre	niyamapattrāṇi
Instrumental	niyamapattreṇa	niyamapattrābhyām	niyamapattraiḥ
Dative	niyamapattrāya	niyamapattrābhyām	niyamapattrebhyaḥ
Ablative	niyamapattrāt	niyamapattrābhyām	niyamapattrebhyaḥ
Genitive	niyamapattrasya	niyamapattrayoḥ	niyamapattrāṇām
Locative	niyamapattre	niyamapattrayoḥ	niyamapattreṣu

Compound niyamapattra -

Adverb -niyamapattram -niyamapattrāt