#180 rephrase according to review comment from Max

CHANGELOG.md

@@ -31,6 +31,7 @@ Each section shall contain a list of action items of the following format: `<bri
 - Use case _Device is connected to the MD LAN network and a user wants to change the device's time_ to account for the fact, that configuring the TS service manually is always forbidden, not just when TS service is operational ([#30](https://github.com/IHE/DEV.SDPi/issues/30)).
 - Changed use case _Devices are operational in the MD LAN network but cannot access the TS Service and clock drift is unacceptable_ so that the decision to continue/discontinue the execution of a System Function while the clocks become less accurate lies with the consumer ([#31](https://github.com/IHE/DEV.SDPi/issues/31)). 
 - Open/Closed Issues sections have been revised. Sections are now generated automatically from Github issues ([#20](https://github.com/IHE/DEV.SDPi/issues/20)).
+- Rephrase R1542 to make sure, that system functions not being available don't lead to unnecessary alarms ([#180] (https://github.com/IHE/DEV.SDPi/issues/180)). 
 
 ### Removed
 

asciidoc/volume1/use-cases/tf1-ch-c-use-case-stad.adoc

@@ -220,7 +220,7 @@ If a <<vol1_spec_sdpi_p_actor_somds_consumer>>'s internal clock is no longer suf
 .R1542
 [sdpi_requirement#r1542,sdpi_req_level=shall]
 ****
-When a <<vol1_spec_sdpi_p_actor_somds_consumer>> disables one or more <<term_system_function_contribution>>s, the <<vol1_spec_sdpi_p_actor_somds_consumer>> shall notify the user.
+When a <<vol1_spec_sdpi_p_actor_somds_consumer>> disables one or more <<term_system_function_contribution>>s, the <<vol1_spec_sdpi_p_actor_somds_consumer>> shall inform the affected users.
 ****
 
 .R1543