extern int may_play_now(struct natstr *, time_t);
/* more under Commands */
/* empmod.c */
+/* in com.h */
/* init_nats.c */
extern int init_nats(void);
extern int player_set_nstat(struct player *, struct natstr *);
extern void takeover_ship(struct shpstr *, natid);
extern void takeover_plane(struct plnstr *, natid);
/* trdsub.c */
+/* in trade.h */
/* trechk.c */
extern int trechk(natid, natid, int);
/* whatitem.c */