1 INTRODUCTION

2 THE LAG-LUMINOSITY RELATION IN THE NEAR-IR

3 USING DUST TIME LAGS AS STANDARD CANDLES

4 SIMULATING THE VEILS TRANSIENT SURVEY FOR AGN
4.1 Overview of VEILS
4.2 Defining an AGN mock sample
4.3 Variability and survey simulations
4.4 Recovering dust lags from the DES+ VEILS light curves

5 RESULTS
5.1 Dust lag recovery statistics
5.2 Constraints on cosmology

6 DISCUSSION OF PRACTICAL CHALLENGES IN CARRYING OUT AN AGN DUST LAG SURVEY
6.1 AGN identification, selection, and redshifts
6.2 Host galaxy subtraction
6.3 Evolution of the lag-luminosity relation

7 CONCLUSION AND LEGACY VALUE TO FUTURE HIGH-REDSHIFT AGN COSMOLOGY STUDIES