Universal 1894:

Original: No inflectional affixes can belong to the set of properties borrowed fro a language unless at least one derivational affix also belongs to the set.
Standardized: IF there ais a borrowed inflectional affix, THEN there is a borrowed derivational affix.
Keywords: language contact, borrowing, affix
Domain: morphology
Type: implication
Status: diachronic
Quality: absolute
Basis: languages mentions in Moravcsik 1978e
Source: Moravcsik 1978e: 112

Counterexamples: Bilin (Cushitic, Afro-Asiatic) borrowed a set of object pronoun suffixes from Tigre (Semitic, Afro-Asiatic), yet no derivational borrowing has this far been demonstrated. The Ethiopian Semitic languages Zway, Soddo and Gafat acquired their verbal prefix ‘ti-’, a bound morpheme, from either Sidamo or Omotic, with no derivational loan from the same sources. (Hetzron 1980: 255)

FP