Yes, dividends can only be declared and paid after the approval of the financial statements.
However, there is no restriction to pay dividends any time of the year or more than one time in a year. Bylaws of the Company must be reviewed to confirm if additional formalities are required.
It is intended that profits are paid on annual basis according to the past annual financials, however, interim dividends are not prohibited if the by-laws have no restrictions.
No, there are no restrictions from a corporate law perspective on lending funds intra-group but cross-border.
From a tax perspective, in the case of loans from foreign related parties to Mexican residents or Mexican permanent establishments, the interest paid by the Mexican taxpayer may be considered a deemed dividend (i.e., the tax treatment of dividends should apply) when: (i) the debtor makes written unconditional promise to pay partially or totally the credit received, at a determinable date by the creditor; (ii) the interest is not deductible -i.e. it was not established based on fair market value; (iii) by virtue of the debtor's default, the creditor is entitled to intervene in the management or administration of the debtor entity; (iv) the interest payable by the debtor is conditioned on obtaining profits or the amount is set based on those profits; and (v) the interests derive from back to back loans, even when they are granted by either a Mexican or foreign financial institution. Furthermore, interest deduction for Mexican taxpayer is limited by thin capitalization and 30% on "tax EBITDA" threshold, transfer pricing and inflation adjustment rules.
Likewise, in the case of loans from Mexican companies or permanent establishments to foreign related parties, the interests shall be determined at fair market value. In the case of loans to individuals or foreign resident shareholders, interest shall be at least equivalent to the rate indicated in the tax laws for the extension of tax payments publishes every year (0.98% per month for 2020) and the loan term shall be maximum one year.