2 Answers
no its not a contravention of AS 9, when dividend is declared on share investment, share prices increase as it become cum dividend, NAV of mutual fund increases (say +3) because of daily valuation rule and profits of MF automatically increase, so dividend is recognised automatically.
when price effect reverses (Say -3) we book actual dividend receivable (Say +3) so dividend effect is booked automatically when declared, no contravention of AS 9