| Answer | Crossword Clue |
|---|---|
| CAA | Board regulating air traffic. |
| conservancy | a board regulating fisheries and navigation in a river or port |
| conservancies | CONSERVANCY, a board regulating fisheries and navigation in a river or port |
| sec | Securities and Exchange Commission: a board, consisting of five members, charged with regulating the public offer and sale of securities |
| secs | Securities and Exchange Commission: a board, consisting of five members, charged with regulating the public offer and sale of securities |
| signboards | A board displaying a sign to direct traffic or travelers |
| signboard | A board displaying a sign to direct traffic or travelers |
