The MSM has been developed by the Agency to provide adopted practices for accepting materials. The MSM version in effect at the time of letting will be the MSM applicable for the respective contract.
| Effective Dates (as of Bid Letting) | Materials Sampling Manual Version |
| February 22, 2024 to Present | MSM24.1 |
| April 25, 2023 to February 21, 2024 | MSM23.2 |
| January 24, 2023 to April 24, 2023 | MSM23.1 |
| October 25, 2022 to January 23, 2023 | MSM22.4 |
| July 26, 2022 to October 24, 2022 | MSM22.3 |
| April 26, 2022 to July 25, 2022 | MSM22.2 |
| January 25, 2022 to April 25, 2022 | MSM22.1 |
| October 26, 2021 to January 24, 2022 | MSM21.2 |
| July 27, 2021 to October 25, 2021 | MSM21.2 |
| April 27, 2021 to July 26, 2021 | MSM21.2 |
| January 26, 2021 to April 26, 2021 | MSM21.1 |
| October 27, 2020 to January 25, 2021 | MSM20.4 |
| July 28, 2020 to October 26, 2020 | MSM20.3 |
| April 28, 2020 to July 27, 2020 | MSM20.2 |
| January 28, 2020 to April 27, 2020 | MSM20.1 |
| October 22, 2019 to January 27, 2020 | MSM19.4 |