1) According to plan 2) As called for 3) As deemed fit 4) As expected 5) As is fitting 6) As is proper 7) As required 8) At the expected time 9) At the proper time 10) By rights 11) Correctly 12) Fittingly 13) How some things are noted 14) In a due manner 15) In a proper manner 16) In due season 17) In proper style 1) Fairly 2) Intime 3) Punctually 
• (adv.) In a due, fit, or becoming manner; as it (anything) ought to be; properly; regularly.
Du'ly adverb In a due, fit, or becoming manner; as it (anything) ought to be; properly; regularly. 
in a due manner; properly; fittingly. · in due season; punctually.