Universal 691:

Original: In initial sounds: the heterorganic sequence of an obstruent consonant and a nasal consonant (e.g. bn) implies a heterorganic sequence of a voiced obstruent consonant and a nasal (e.g. dn), this implies a heterorganic sequence of a voiceless obstruent consonant and a nasal (e.g. pm), and this finally implies a sequence of a voiceless obstruent consonant and a liquid (e.g. pl).
Standardized: IF there is a heterorganic cluster of an obstruent consonant and a nasal consonant (e.g. bn), THEN there will be a heterorganic cluster of a voiced obstruent consonant and a nasal (e.g. dn).
IF there is a heterorganic cluster of a voiced obstruent consonant and a nasal (e.g. dn), THEN there will be a heterorganic cluster of a voiceless obstruent consonant and a nasal (e.g. pm).
IF there is a heterorganic cluster of a voiceless obstruent consonant and a nasal (e.g. pm), THEN there will be a heterorganic cluster of a voiceless obstruent consonant and a liquid (e.g. pl).
Keywords: consonant cluster, phoneme order, nasals, liquid, initial, heterorganic
Domain: phonology
Type: implication
Status: achronic
Quality: absolute
Basis: unspecified
Source: Holenstein 1985: 129

FP