-- You may mention about the Marriage gift (Cheque etc.) usually given by management to the concerned employee [In case you have it. Furthermore, I suggest to make such rule to complete the policy/ counter balance the policy effect]
Usually, this amount is same for all grades and the cheque is given to employee on the Marriage day by HR.
-- Your policy will include effective date of the policy as well.
-- You can put it on the notice board and later include it in your HR Policy docket
Contact me in case you need further help.
23rd April 2019 From India, Pune