Tests ofCPTconservation in the neutral kaon system

We make use of high-precision measurements in the neutral kaon system to analyze how well $\mathrm{CPT}$ is conserved. Although present data provide rather stringent tests of $\mathrm{CPT}$, actually these measurements provide bounds only on differences of $\mathrm{CPT}$-violating parameters. Although $\mathrm{CP}$-violating phenomena in the $\Delta S=2\mathrm{}$ sector are dominantly $\mathrm{CPT}$ conserving, present data do not allow a similar unambiguous statement to be made for the $\Delta S=1\mathrm{}$ sector.