The typing rules for the SSC CHSL (Combined Higher Secondary Level) exam may vary, but here are some general guidelines you should be aware of:

1. Typing speed: The minimum required typing speed for the SSC CHSL exam is 35 words per minute (WPM) for English and 30 WPM for Hindi.

2. Language: Depending on the specific SSC CHSL examination, you may be required to type in either English or Hindi. Make sure you are aware of the specific language requirement for your exam.

3. Format: The SSC CHSL typing test is usually conducted in a format where you type a given passage of text within a set time limit.

4. Accuracy: In addition to typing speed, accuracy is also an important factor in the SSC CHSL typing test. You should aim to minimize errors, typos, and mistakes while typing. Maximum 7% error allowed in SSC CHSL exam.

5. Test duration: The duration of the SSC CHSL typing test is 10 min.

6. Equipment: The SSC CHSL typing test is usually conducted on a computer, and you will be required to use a standard keyboard to type.

7. Practice: It is highly recommended that you practice regularly with Speedo Typing Sofware to improve your typing speed and accuracy before taking the SSC CHSL exam.

It's important to note that the SSC CHSL typing rules and requirements may vary from year to year and from region to region, so make sure to check the official SSC CHSL website or consult the relevant authorities for the most up-to-date information.