Company: RFMZ
Filing Date: 2025-05-21
Form Type: POS EX
Source: 0001398344-25-009966
Chunk: 2

Company: RiverNorth Flexible Municipal Income Fund II, Inc.
Filing Date: 2025-05-21
Form: POS EX
Chunk 2
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 not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. |
| [  ] | New Registrant (registered or regulated under the Investment Company Act for less than 12 calendar months preceding this filing).                                                                                                                                 |

<div align='center'>EXPLANATORY NOTE</div>

This Post-Effective Amendment No. 1 under the Securities Act of 1933, as
amended (“Securities Act”), and Post-Effective Amendment No. 17 under the Investment Company Act of 1940, as amended, to the
Registration Statement on Form N-2 (File Nos. 333-281396 and 811-23586) of the RiverNorth Flexible Municipal Income Fund II, Inc. (as
amended, the “Registration Statement”) is being filed pursuant to Rule 462(d) under the Securities Act, solely for the purpose
of filing Exhibits h.1, h.2 and l.3 to the Registration Statement. No changes have been made to Part A, Part B or Part C of the Registration
Statement, other than Item 25(2) of Part C as set forth below. Accordingly, this Post-Effective Amendment No. 1 consists only of the facing
page, this explanatory note and Item 25(2) of the Registration Statement setting forth the exhibits to the Registration Statement. Pursuant
to Rule 462(d) under the Securities Act, this Post-Effective Amendment No. 1 shall become effective immediately upon filing with the Securities
and Exchange Commission. The contents of the Registration Statement are hereby incorporated by reference.

<div align='center'>PART C - OTHER INFORMATION</div>

Item 25: Financial Statements and Exhibits

| 2.  | Exhibits:                                                                                      |
| a.1 | Articles of Incorporation. (1)                                                                 |
| a.2 | Articles of Amendment and Restatement. (2)                                                     |
| b.  | By-Laws of Fund. (2)                                                                           |
| c.  | None.                                                                                          |
| d.  | None.                                                                                          |
| e.  | Terms and Conditions of the Dividend Reinvestment Plan. (3)                                    |
| f.  | None.                                                                                          |
| g.1 | Investment Management Agreement between Registrant and RiverNorth Capital Management, LLC. (3) |
| g.2 | Sub-Advisory Agreement between River