Universal 1259:

Original: When an otherwise harmonizing unstressed vowel becomes stressed due to intonational factors, then it can no longer harmonize.
Standardized: IF an otherwise harmonizing unstressed vowel becomes stressed due to intonational factors, THEN it can no longer harmonize.
Keywords: assimilation, vowel harmony, stress, intonation
Domain: phonology
Type: no genuine implication; rather: provided that
Status: achronic, diachronic
Quality: statistical
Basis: languages in Ultan 1973
Source: Ultan 1973: 48

FP